Playstation has always been the platform of diversity. Both in quantity and quality. I didn't get a PS1 at launch....because I was like 6 when it came out and I didn't have money. But after seeing friends have it for 2 years and how much fun it was, I asked for one for Christmas. Same with the PS2. With PS3, I got one a year after it came out, but it was the same logic.
With the 4th go around, I got a PS4 around launch time. Because, at this point, I know what kind of gaming is going to happen for me for this generation. Evert genre is going to be coming to the platform, and not just one-offs, but a good amount of everything. It was like that for the PS1, PS2, and PS3. It stands to reason that it will happen for the PS4. Quality JRPGs, Fighters, Adventure, Action, etc games, many of which will be exclusive (not just one or two you can point to and say "hey, these types of games are on this platform as well"). There's no one "focus" when it comes to Playstation, as history has shown, and I enjoy that. That's why I bought the console.
Sure, there will be multiplatform games, and they may very well take up the majority of my library, but that comes with the territory of a console's library having a high amount of multiplatform games. But, when we're talking about exclusive games, the above mentioned is what separates PS from everything else.
