Only ones I can think of are Fortnite and Daylight.

They constantly expand UE, and continue to port over new functions to UE3 right now, but you're wrong if you think they just decided "i know lets mod UE3 a bit and call it UE4 for marketing reasons", each engine is built from a baseline aimed at the current capability of the average platform of the time when the engines built, there are functions in UE4 that could not be done in UE3 without a major rewrite, and if they were to rewrite much of the UE3 code to support the newer functions for higher end hardware then the optimizations made for UE3 and compatible consoles/hardware would be lost and cause developers to require more work.

Yes they could make UE3 run on PS3/Nextbox but what's the point when they'd already been working on a newer engine to make the most of advancements in PC technology?

No, I didn't said UE4 is a pimped UE3. I said they COULD have added the features to UE3. I'm a programmer, not for games but other stuff. I know how good it is to redesign a software to get rid of all the old stuff that holds you back and is in it only for compatibility. I assume that happened with the new version. So UE4 is probably better and it will be easier to implement new feature in the new engine than in the old. But it should be possible. That's all I said. The nex-gen-speak is marketing lingo.

The point you missed is, if they changed the UE3 engine to work on, and fully utilize the durango and PS4, it would no longer be optimized for the PS3, 360 and mid range PCs, by leaving that generation and creating a new version of the engine, while supporting both, they continue to offer a stable solid platform for the previous generation while offering something for the next.

So, currently UE4 missing WiiU is a non-issue. And we don't know how the situation will be in a year. I can guarantee, if games from customers of Epic sell well on WiiU, Epic will reconsidering the decision.

But generally it would be a clever move, if Nintendo would invest in porting the engine.

I don't think so. but I think it is better business to make a new engine for the new platforms. That way they get rid of obsolete stuff and it is easier to develop new features. The development will be more dynamic and produces lesser bugs (keeping compatibility is an endless source of bugs). So I fully understand the decision to have UE3 for older platforms and UE4 for newer.

And I also think they could easily support WiiU with UE4. But they probably don't expect much devs that are customers for UE to develop for WiiU, and for these cases UE3 might be enough.

Directly supporting WiiU defeats the point of developing UE4 for higher end systems, leading me back to my point that they have, and still support, UE3 for that very reason, for mid range PC, PS3, 360 and now, WiiU.

But UE3 does run on PS4/720 and it will run MUCH MUCH better than it did on current consoles. Look at the Samaritan demo as an example of what is possible with that last-gen engine. Unreal Engine 4 is built to take advantage of next-gen consoles, just like UE3 was built for current-gen. It's as simple as that. You can spot an UE3 a mile a way. This is a negative thing.

As to which UE4 games have been annouced, nothing notable yet. Just some PC games, some of which are also coming to PS4.

Next-gen han't even started yet.(No offense to Wii U)

Expect the next Batman game, the next Mortal Kombat, Borderlands 3(?), the "next Gears of War" from Epic.....these are all games that are certain to use UE4 since they used UE3. So unless these games I mentioned are also  coming to current-gen, expect UE4 to be used.

Yes, as I said, UE3 can run on new consoles and it also could support newer features. But depending on the architecture it can be a pain in the ass to add features to an older engine compared with designing a new one. UE4 is not only built to take advantage of newer consoles, but also to run on Smartphones. It could be ported. Again, that would be work and maybe a pain in the ass to do that. But it could be done. I also put reasons why Epic probably didn't do that: Epic cannot expect many devs to license UE for development on WiiU, as Nintendo is not supported that well by western devs, the main customers for UE.