This list is so misleading. The 1/2 for three of them is incredibly misleading. And there's no way we get FIVE AAA titles out of those a year. We'd be lucky to see three a year, with a couple of those releasing maybe 3 games all of next generation.
Sony has killed a ton of studios in the past year. You can call ignorantly call this "gearing up for next generation" but it is more likely the rats leaving a sinking ship. Generation changes are when systems need to court as many developers as possible, to get them all in early and comfortable with the platform. Sony's killer practices are seriously jeopardizing next generation before it has even begun.
Really? Well, lets take a closer look.
Santa Monica 1 - They've been on three year rotations.
Santa Monica 2 - No idea, but lets guess also three years.
Naughty Dog 1 - Two years.
Naughty Dog 2 - TLoU has been longer, but because it's a new IP, they should be two years too.
Sucker Punch - Two years.
Polyphony - Technically they made a PSP game, but lets say four years, so two in the generation.
SCEJ - They do a bunch of random stuff, but lets say a 'real' game once every four years too, like Puppeteer.
Guerrilla 1 - Two years.
Guerrilla 2 - Lets suggest two years.
Media Molecule - Two years.
Evolution - Two years.
Let's assume the next generation is eight years in earnest. That's five from Santa Monica, eight from Naughty Dog, four from Sucker Punch, two from Polyphony, two from SCEJ, eight from Guerrilla, four from Media Molecule, four from Evolution. That's four and half games a year, some of those are probably a little generous, so I might say four is more likely.
EDIT: Actually, let's say six years, as that's more likely to be the case I guess, although I do think next-gen will be even longer than this one was. That's 4 from SM, 6 from ND, 3 from SP, 2 from PD, maybe just 1 from SCEJ, 6 from GG, 3 from MM, and 3 from Evo. That's still more than four and a half, but yeah, a more likely time scale.