PS2 is dead dude. Hasn't had a good game made for it since Persona 4 in December 2008. Only other games it's gotten in the past 2 years is sports games. I give credit to Sony for living up to the 10 year plan though, PS2 is the best of all time...but its gone now.
And also the PSP is pretty much dead already (5 games over 80 metascore in 2011, none over 88)...and I'm guessing 2012 won't be any kinder on it, especially with all the big games going to Vita and 3DS.
I would pretty much already consider them down to just 2 (PS3 and Vita)...but if you want to get technical then yes they do have 4 consoles on the go, two of which don't get good games anymore.







