For me I go where the good games are, not where Sony/Microsoft or Nintendo personally go as a company. As long as these systems put out good games I will buy their systems, some sooner then others.
I will still get the PS3 despite it's price and how unimpressed I've been with Sony as a whole lately. But this doesn't mean right away more a few years down the road I will purchase one. I don't let console loyalty come into play for me, since all it does is limit me from good exclusive games on all consoles, I play games for entertainment not to be a companies cheerleader.
So yeah I follow that road, play all the good games you can regardless of platform.