PC Gaming itself will never die, unless the PC dies altogether.
But PC Gaming is already not even close to what it was a few years ago anymore and thus dead as it once was. That wouldnt be a problem if it was just changing as in getting better, but its actually getting worse and worse. Gameplay getting simpler and simpler, features getting cut each release, graphics being worse or max. as good as 3 years ago, content getting less and less, prices going up, patronizing getting more and more (gameplay-wise and DRM-wise), etc, etc.
For me SC2 is no real PC game either. Its somewhere between console port and real PC game. Most of the game is hype anyway.
I have given up on waiting for BIS to come back to their senses and do a real ArmA 2 successor.