Xanto: Like I said before you assuming that down the road the windows platform will still be an open platform and that emulator will still be usable. As said you could go linux and try to get them working under linux but to a lot of people that is going to be more trouble than's it's worth unless someone does a good job and getting these old games running on it that's easy for the end user.
Your assuming the way we do things now, is viable 30 years from now... when it not likley.
You are forgetting many things: oldschool gaming is now a niche. Playing actual games in the next 30 years is oldschool gaming, so people who will really want to play them, will be at least like now: a niche. And being a niche won't prevent motivated people to make emulators or software able to make them work. Well... just like now. Name one old hardware that haven't already opensource emulators working
now on opensource OS. If some people aren't motivated enough to try to play their games on linux (for example) because linux would be the only OS to make them work, well, these people aren't really interested in retrogaming at all, and won't even try. Just... like now.
One another thing, you are assuming that windows will be the main OS in the next 30 years. A dream. Or a nightmare. But nothing but speculating. Administration in many countries are turning to opensource OS since years. And it's only the beginning. So assuming that Linux will be a niche in the next 30 years is only speculating.
Xanto: Then your drop back to running old hardware and old PC's to play these games? What if you if you need to replace a part and need the driver or a newer driver? Most likley any site which hosted the driver would be long gone by that point.
If someone could %100 guarantee that in 30 years every old part you need, every extra old software needed by the game, and every old driver could be obtained to run these old games then I'd say yea DRM is without a doubt the way to go. But you can't...
I think you are missing two main points:
-first, the Moore's "law" is coming to an end, hardware won't be more and more powerfull forever. Even now many techs are discussing about that "end", and how to compete. Some of them are turning to streaming and online-only gaming only to legitimate the fact customers could spend money for their services. Some just want to make better softwares and to improve coding (look at the reports of the Linux conference). So hardware will hardly be different than the one we already have.
-secund, you're missing the opensource point, and how people can be motivated to make their dreams come true, especially when they have tools to make them. So, don't think that drivers would be a plague.