Graphical fidelity is one improvement. Larger, seamless dynamic worlds that have vast numbers of intelligent A.I. Imaginean online fps that has day/night cycles.

I have always envied the output of ETC!!!!!!!!!!!!!! Studios. "UnResisted 4: Fall of the Risen" and "Uncle Kaz's Hot Tub" often created moral conflicts in my fanboy mind.

Maybe not for him, but I am sure that people bought  a PS2, or PS3, and did not know it was a console. The only reason I had a PS2 in my house was because my dad saw it as  a DVD player. New optical media is not the sole reason why Sony consoles sell, but it does have a significant impact.

HoloDust said:

Indeed!

It wont offer a new optical format, but it will offer more functionality than the PS3. Not only more apps and services, but faster access to them, multi-tasking....etc. Most importantly.....games. Games not possible on PS3, games not available on PS3.

For the games?

I don´t know about you, but I love the variety of Sony´s 1st/2nd party games, and if I want to keep playing them, which I do, I´ll have to get me a PS4.

If those were the only legitimate reasons to buy a console no one would've ever bought any console made by Nintendo!

For Versus 13 obviously, using the PS4's new vapour condensing technology.

That did happen to a certain extent. See the N64 and GC.