And no.
Linux was never a very good desktop OS. Though it was a fair to perhaps good workstation OS. However, the future of the desktop may well be in mobile-heritage OSes such as iOS and Android. Just as the PC grew to fill its mini-computer and mainframe big brothers' shoes so mobile OSes are likely to mature into robust desktop platforms (though founded on different paradigms).
And if that's the case, then the linux desktop dream may yet live indirectly, through android and related offerings (chrome OS, etc.)