I wouldn't get too worried about it - IBM was in the same dominant position in the 80's,and now it's just one of quite a few the big players (at that time, Microsoft, Oracle, Dell, Google, AOL, Cisco, etc, were only small/medium players, or didn't exist).
Google will probably rise, Microsoft will probably sink (a bit), and then someone else will come along a do a Microsoft/Google on everyone.
What comes around, goes around.
ps - I was around at the time of the original open vs proprietary software wars in the 80's - Unix was then seen as the "open source" saviour of the world. As we used to say at the time - "which version of Unix is the "open" one?"