We just had this thread. What happened to it?
Anyway, Sony is the most likely to bow out while at the same time have the most potential to succeed next gen. Assuming things go as planned, Wii U is released with modest specs and the other two fight it out with powerful machines, than I can see Sony bouncing back nicely after this rough generation.
They would have to play their cards right but its all there for the taking. Release the PS4 right around the next Xbox launch and at the same price (or cheaper). That is crucial and can make or break Sony.
If you break down the three markets, than Sony has a decent shot at 2 of them. Obviously Xbox is dead in Japan so if Sony was smart they would not let MS secure exclusives there, instead sign their own. Studios have much more incentive to sign with Sony as they could actually sell games on that platform. If the tech gap is great enough between the Wii U, than secure the next FF (as we heard Square likes to push the envelope with that franchise). That will not only help in Japan but worldwide.
Next, get GT6 out within the first 2 years for Europe. UK aside, Sony has done a good job in Europe with a very high console price. Capitalize on that loyalty/brand power.
I cant see them outselling the next Xbox in NA but I can see them split it. Free online, a much healthier Japanese support and equal parity between multiplats without the 1 year headstart will make all the difference.
So maybe its not "easy" per se but the potential is there. Continue with the strong first party support and new IPs as well. I didn't talk about Wii U that much because honestly, its a huge wildcard and impossible to predict. Same with any unannounced next gen innovation that can throw a wrench in my predicitions (controllers, massive third party exclusive, online features, etc).