I can't say that linux is weak for gaming
i haven't used dualboot for few years and i still have played a lot of games
native and with wine.
there are many games that work out of the box via wine.
ofc there are plenty that doesnt or need some dirty hacks.
still there's a lot of games to play. u dont even have the time to play them all.
and now with the steam coming and lots of kickstarter games getting native ports. things will go even better.