>>10first of all, make sure to check my dubs. now, to the point: the idea that scriptable chess and an SL clone can replace games people play on windows is based on a fundamental misunderstanding of why and how people play vidya. first of all, this limits the number of games that can be played to those scripted inside chess engine or SL - so you might be able to play 'a role-playing game' but it will probably not be the role-playing game you want. I mention RPGs specifically because this is important for narrative-driven games: there's a world of difference between 'an RPG in a post-apocalypitc setting' and 'Fallout 2'. this is of course also important for multiplayer-focused games: you might play 'a multiplayer first-person shooter' but this won't be the same as e.g. 'playing competitive Quake 3'.
more generally, chess engine and SL clone provide so little for most of the games that aren't chess or SL that you'll need to program most of the games from scratch or port them. and this doesn't offer anything new: 'gaming *nix which can play the same games as Windows' would be a big deal, 'a *nix which can play all the games written for that *nix' is
every single *nix ever.
tl;dr saying that chess engine and SL clone will remove the need for Windows-based games because they can be theoretically supported is like saying that Brainfuck removes the need for C because it's Turing complete.