20 years ago I would have considered the idea of being able to play every dos game ever made directly in a browser without waiting science fiction.
I guess it will happen eventually; I think the biggest concern with preserving games now is the amount of functionality provided server side that is lost (maybe forever) when the game company switches their servers off.
While that may be true (looking at the history of other games) you can also pretty much count on somebody reversing the server side and putting up a reverse engineered server then.
I guess it will happen eventually; I think the biggest concern with preserving games now is the amount of functionality provided server side that is lost (maybe forever) when the game company switches their servers off.