Battlefield 4
Killzone: SF
Infamous: SS
Project Spark
PES 2014 ( It won't be on PS4one, but it looks next gen to me)

Killzone: Shadow Fall
Infamous: Second Son
The Division
Super Smash Bros.

Metal Gear Solid V: The Phantom Pain

Grand Theft Auto V

I want to say Quantum Break but we haven't seen any gameplay yet

It all depends on what 'nextgen' means. I associate nextgen mostly with the graphical leap between console cycles and secondarily with gameplay that couldn't be accomplished in previous generations. As for launch, the titles I see as nextgen are more graphical because I don't think the launch window titles will provide much in terms of innovative gameplay.

Ryse has great nextgen graphics, but the gameplay is pretty lackluster. As far as the combination of graphics, scope, and gameplay, The Division and Infamous: Second Son are pretty nextgen, but openworld titles never scream nextgen on first impression because the graphics don't pop like some smaller scale games do. And in terms of gameplay, neither one of these are likely to be more ambitious than GTA5 so they kind of make me go 'meh'.

Overall, I'd have to give it to Battlefield 4...even though current PCs are doing the same thing.

graphically -- well basically everything has impressed me. kz looks amazing. the division looks amazing. destiny looks amazing. ryse looks amazing. ect and so forth.

for gameplay however, i don't see much in the way of risks yet. i'm trying to think back and i don't remember any launch games revolutionizing gamplay at launch either. it wasn't until a year in when titles like gears, infamous, assassins creed, ect that really impressed me.

i think the only one i'm impressed with from a gameplay perspective is watch dogs. it might not be a huge leap in "what's possible" from assassins creed but i love the ideas ubi is packing into this title.

i might also be impressed by destiny. jury is out on that one until i see more gameplay. more evolutionary than revolutionary but the scale and scope seem to impress at this point.

From Wii U:

X:

MK8:

Pikmin3:

B2:

From Multiplat:

The Division:

Watch_Dogs:

Witcher 3:

From PS4:

KZ:Shadowfall

Infamous SS:

Was wondering where the Witcher 3 love was...looks incredible next gen!