Note he said *favorite* game, not *some* game or a *casual* game. There
is this category of users (I am part of it) for whom a Windows PC at
home is pretty much a game console (but with better games than an
ordinary game console).

absolutely true i am a part of that league too.

Unfortunately here we can't do much beyond getting an as good as
possible Wine, is all about 3-rd party entities porting their games to
Linux (some argue this will happen when Linux will have a large enough
market share).

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hope the days are not far away where 3-rd party entities are releasing games for linux. i think quake 3 is already a member of it.and what about cedega? may that can help a little.i think this is the only area of concern for marketing linux to students who happen to be gamers.the first thing they ask is "can i play call of duty 4 in linux".hopefully a solution will be found in the years to come.