Quite a few it seems.

Darksiders
Crackdown
deBlob
Dead Rising
Lost Odyssey
Metro
Madworld
Wii Sports
Uncharted
Souls
No More Heroes
Assassin's Creed
3D Dot Game Heroes
Deadly Premonition
Patapon
Left 4 Dead
Portal
Minecraft
Hotline Miami
Super Meat Boy
Terraria
The Witcher
Company of Heroes
Mount & Blade
BIT.TRIP
Sleeping Dogs

About 80-100 of the 250-300 7th gen games I own were new IPs. You can look at my backloggery and figure out the exact number but if I don't care to know then neither should you.

Assassin's Creed
Uncharted
Wii Sports
Vanquish
Mirror's Edge
Enslaved
Gears of War
Bioshock
Borderlands
The Conduit
Alan Wake
Dead Space
Heavy Rain
Beyond: Two Souls
Resistance
Skate
Red Steel
No More Heroes
MadWorld
The Last Story
Infamous
Ghost Trick
Scribblenauts
Catherine
DJ Hero
LittleBigPlanet
The Last of Us
Lost Planet
Remember Me
Resonance of Fate
Warhawk/Starhawk
Saints Row
Crysis
Crackdown
Prototype

and I could keep going. At least 50% of my games from last gen are new IPs