Now maybe powered speakers will not happen, maybe they will. Almost all subwoofers are powered, so I kind of see the appeal for future generations that never owned a proper stereo, of just having a single music server/streaming music device feeding audiophile quality powered speakers.
EDIT: note, just read the bolded text to get the gist of my "big post" LoL
Keep in mind... powered speakers are not inferior as a rule. There is a reason why many many recording studios have active monitors. No passive crossovers is a good thing (actives are far better). Designing the amps specifically tailored to the driver they have to power is another good thing. I'm aware that you don't get to pick and choose your power amps this way, or in some cases even your d/a converter (some powered monitors have them built in although most studios still use outboard converters for various good reasons (not always specifications related though)).
But powered speakers can actually perform better than unpowered speakers if things are done right. I know, it's not an uber high end sort of concept. But it's done in many many recording studio monitors for performance reasons, not for econemic reasons.
Don't jump on a technology that can work great. Same with
an ipod playing flacs or oggs (both are lossless perfect quality audio encoders). I do that on my ancient black and white-screened ipod mini (using an alternative OS I installed called rockbox) and it sounds, well, perfect. performance is incredible if using the line output from the dock mount while connected to any good hifi system.
Better performance in fact than cd can give (although I'm perfectly happy with a well mastered cd... just that finding a well mastered cd isn't always so easy unless I do it myself).
wireless almost-instant downloads that start streaming right away but still give you lossless digital audio are not that far off. it doesn't exist yet, it's still all about compression if you want instant gratification, but you can get flac/ogg files now in a matter of minutes of download time even over wireless.
That's a boon to the music industry if handled properly (so far imho it hasn't been handled properly).
But the media doesn't define the quality of your playback components. People have made do with cassette for decades while their systems were otherwise incredibly high performance (admittedly getting the best out of it and turning it into a hifi medium when it wasn't originally intended to be hifi at all). The same is happening with consumer-creatable file-based digital audio... it's improving by leaps and bounds and can now effectively be the center point of a high end home audio system, if you have the right gear to create/decode and otherwise manage those files with quality matching the rest of your hifi gear.
So don't worry about the future from the technology POV. I think it will be just fine. Humans love great audio.
But what I do worry about is the business decisions being made in the recording industry. We're not (speaking as a member of that industry) taking control, instead we're constantly in a reactionary state to whatever happens each year in the home computer/internet world. As a result of our short sightedness we've lost billions, as have tends of thousands of recording artists and composers. So that is what worries me about the future. There HAS to be an effective way to manage the music business so it stays a business, otherwise the world will change dramatically. Not that I'm against giving away my musical skills, talent, and decades of training for free, I have no problem with that. What I have a problem with is not having the ability to eat, feed and house my family, and provide for my children's education as a result of not earning money in my career.
That's something that is a real problem for the future of "why our hobby won't grow". It CAN'T grow if we all eventually grow tired of listening to the same albums from 40 or, eventually, 100 years ago,
while fewer and fewer new albums come out of any consequence as fewer and fewer musicians make the choice to dedicate their lives to creating albums since, in the future that I'm worried about, those decisions see clearly that
they have no chance of earning any useful income from it.
We have to be practical as musicians and people in the recording industry, it's about our talents and love of music and our training, but it's also got to be fair to our families and our own ability to live or there is no way we can continue creating music of any consequence for the hifi enthusiasts of the future to enjoy.
end of my rant
sorry that I got on the soap box there. I don't feel it's off topic, but maybe others will.
cheers!

Don