Non-numbered games is far from an issue. If it was, we would have God of War IV, not Ascension. Super Mario stopped being numbered on 3, and nobody gives a shit. If it has the IP name, that's what counts.
The problem with Sony's approach on portables is that they insist in creating a home console experience on the go. They take their big IPs, and put it on the small screen. That's something I support, but don't do JUST that. Create new IPs exclusively for the portable, experiences that actually work on the go and stuff. Some of the best-received games on the PSP were Patapon and Locoroco for example. Half-Minute Hero also has some fanbase (I think it's one of the best games on the system). Do more stuff like Gravity or Little Deviants instead of Assassin's Creed and Call of Duty for christ's sake. Nintendo doesn't have the problem because Mario works on the go in any way, shape or form, and they have Pokemon since always.
