I understand your arguments. But can't you see that this is not realy about a online game store that also offers DRM games, but about Windows users getting their already bought games ported? About the free software markshare? About tiny game studios and indie developpers that can now be offered a platform for which they can now also sell their games for a fraction of the price for Linux?

I still think that you head is stuck in 'Why would I buy a DRM game?'. You do not have to. You can also buy a non-DRM game from id software and in the future a lot more DRM-less Linux games. The marketshare will also result in more users thus more pressure on not buying Intel GMA500's and whatnot.

The bigger picture