So lets break it down:
no DRM, trading discs as much as i want,
not needing to phone home to actually play my games,
more exclusive games (especially counting the pc, as a pc gamer that's a biggie for me, i wont forget you M$ for each timne you announce an "exclusive" but it actually also comes out on pc! not that sony has ever done taht...

)
more diverse exclusive games,
psn needed to play online, bummer, but they give discounts and a free game per month, honestly if i had
a ps3 i would have done that unasked, the free game alone would have sold it, still bad that its now requiered for something I consider to be a fundamental feature
costs 100 euros less,
and they have the bloody balls to take a chance and make a video directly punching their competitor in the groin for the mistakes they made,
and it turns out to be actually funny ^^
if I ever have the money to afford a TV AND a console, I will choose you ps4 as the little companion piece for my pc
edit: oh an d no region locking just for good measure, which also, as a european and often getting screwed over this, is a big thing for me