Microsoft sues Barnes and Noble over Android

All I wish now, is that at the end of the "war" open source emerges as the clean winner, and the patent trolls as the losers.

Are your really sure you want to see that? History does not repeat itself but it rhymes so it's good to know it. The good example is chemical industry.
1862: Britich control 50% of world market, French - 40%, Swiss and German are marginal players.
1873: German companies have 50% of the world market, French, Swiss and British have between 13% and 17% each.
1913: German firms control 80% of the world market, Swiss - about 8% and the rest of the world is the remaining 2%.

Today we have the same story with software. Only place of Gernamy is taken by China. Eventually open source will win (kinda) and trolls will lose (kinda) because software development will mostly move to China (and may be India). Why do I say trolls will kinda lose? Well - they will still have a viable "business" even when software development will happen in China and most of software will not be importable to US, but it'll not matter as much because most of world economy will be in China (and may be India) anyway. Why do I say open software will kinda win? Well, Chinese firms will use open software where available but they will use proprietary software too - and more often then not they will just ignore software licenses so GPL will not matter anymore...

The whole patent hoopla is suicide move - but sadly it's suicide for industry and country, not for induvidual company, so Microsoft will not backpedal... It makes perfect sense for any induvidual company because it increases piece of pie it gets... even if it reduces the size of the pie.

P.S. I still hope something will stop death spiral: is it really true that century and half have not taught us anything WRT patents? I expect not. But so far we are firmly on this suicide route.