bit late in sorry..Very interesting article that.. I praise the day when i can ditch MS Windows in favour of choice of OS. I've played a few steam games in MINT it all works smoothly.. Just those tied to DX roots.

i just can't ever seeing it happen though.
I think the problem is that there is such a back catalogue on Windows that doesn't exist on Linux that people are reluctant to change. So the audience for the games is on Windows, so that's the OS it makes sense to target. Linux has to be a side effort for very little reward, at least initially.
I mean if every game released was released on Windows and Linux from now on, it'd probably still take years before people were completely ready to give up Windows and lose all the non-Linux games they have. I've still got friends that go back and play Skyrim (with mods) or Dragon Age or something like that, no reason to think that won't be the case going forward too.
Also, myself and friends will quite often buy things like Final Fantasy 7 when they get released on Steam despite their age. While people do this it'll be difficult to abandon Windows.
Dual booting might make sense if the Linux versions performed better than the Windows versions.
Unless DX moves to Linux the only API currently that would allow games to run on Linux is OpenGL. Mantle can claim to be open and support multi-vendor as much as it likes, but until it's working with at least Nvidia and hopefully Intel hardware Mantle is only viable as an additional API not
THE API. So from that, I'm really not sure what good bringing Mantle to Linux is going to do as far as making Linux a more viable OS for developers to target.
Unless this video that Matt's teasing contains something surprising.