So now you have Id's Tech engine (carmack), Valve's Source Engine & Unreal engines all perfectly capable of making a glitzy gameS on something OTHER than DIRECTX/WINTEL.
Simple porting as a rule will speed this war along. OpenGL runs on everything (yes even those 39% XP users) and once your engine is ported to it, the major battle is over and porting the games themselves from windows-linux-osx-android is simple. It seems going forward you'd be a bit short sighted to make any content tied to a directx version and by default windows upgrades for your customer base. It will be much wiser to go opengl for your next engine (or use someone else's already on opengl) and be able to reach a MUCH larger audience with very low porting costs to reach them all.
All of these companies attempting to help kill WINTEL dominance will seriously hurt MS unless they buy some chip company to start controlling some hardware. Intel will survive this (porting to android for x86 etc moves show this), but Windows/Office margins will be driven down as they lost the gaming crown/tie-in to windows sales. If I don't need games I can leave. A dual boot of linux/android on every device in the future gives you games on both (whichever gets the port first you'd use) and googles apps to replace office etc.
Apple also has an opportunity here to kill windows. If they would stop IDing your hardware as Apple only and sell their OS to the rest of us (say $75 for a full copy) then we get a cheaper way to create content also. Adobe etc are on OSX so windows would lose yet another stranglehold reason most of us have for staying on Windows.
The world is changing fast. Assaults on MS shown here. Assaults on Intel (platform alliance to speed smaller chip tech with IBM,GF,TSMC all joining to share research to diminish Intel's fab leads) and we've already been watching assaults on device makers. Amazon is about to release the $400 phone that's probably going to sell for $200 which will drive all phone makers margins down just as they've been doing with tablets. I suspect Amazon will make the most powerful phone they can for around $200-250 but with ZERO margin (to seriously damage any sale of $400-500 phones). So while the rest pocket 30-50% or so on a phone (some more) they'll sell it at break even to cripple your profits/margins. It won't kill all $600 phone sales, but if it's close enough to them and $200-250 it will steal a lot of sales from people who cringe over that $600 cost. Driving down margins for device makers is what's killing nokia, killed motorola etc.
http://www.androidauthority.com/samsung-galaxy-s4-shipments-topping-early-estimates-says-analyst-185612/
Galaxy s3/s4 for example has a margin of 46/48%. This will be tough to maintain going forward as Amazon/Google seem content to make next to nothing to kill everyone else (they profit from content and ads not devices). Sammy obviously lasts longest here as they source 60%+ of the crap in their phones/products from themselves. Component makers can still make a ton during this huge war, but DEVICE makers will suffer if not sourcing most from inside like sammy. We will see more device makers wither and die or get bought (HTC comes to mind etc).
All in all, I can't wait for linux/android (via OpenGL, webgl, html5 maybe some opencl) to take over my gaming which will finally release me from my next windows upgrade

Bring on the opengl war please
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I expect console sales to suck also (worse for MS with always on DRM crap) further hurting the Windows/DX platform. Steambox, Ouya, Shield, Razer Edge, Wikipad, etc all after consoles sales (not to mention phones/tablets taking some too). Sales of Vita/Wiiu/3DS show a new console doesn't automatically mean sales this time. That party is over. EASY cross-platform gaming is the wave of the future so you can play anywhere, and devs can reach the largest audience easily. MS is in seriously hot water pissing of the end users with win8 and valve with the appstore etc. Everyone is hating them and actively seeking destruction of their platform. It appears Win8.1 (9? whatever) is still shoving the same crap at us so they may never recover from the next 2yrs of crap we ignore (win8 sales worse than vista! 8.1 will be worse than win8!). Either MS wakes up and makes the OS we WANT immediately or they face total destruction going from PC stalwarts to basically a Rimm fiasco. It only takes 3-5yrs for all these huge death spirals to take place (nokia, motorola, 3dfx, rimm, palm etc etc).