[Shank]

In effect they are. No android support, now nothing except Chrome support on Linux. I'd assume that if my theory is true, Mac OS X will take a similar route(why it didn't happen first is beyond me) before Windows finally meets a similarly gimped fate.

[notatoad]

Don't forget that windows is already taking their own steps in this direction with the IE10 metro mode.

[bzbarsky]

Mac OS X probably didn't happen first because there are way more desktop Mac OS X users than there are desktop Linux users...