I come from offline rendering and don’t really see much use in that at the moment to be honest.
It’s a neat addition when the Maxwell cards will be out in a week, because people who happen to work with UE4 will end up having 970s, or 980s soon so there will be a huge jump in case you feel like using Octane inside UE4 for whatever reason.
As we already know Kepler cards perform awfully in GPU PT. In fact I still often see people who render basic studio light setups without the need for much VRAM still rocking 5xx cards until the present day.
GPU rendering became even bigger this year with Vray RT, Arnold GPU and Octane around, but I’d rather render this stuff out from a full fledged 3D app.
For now Alembic support looks a lot more interesting for realtime rendering bringing in a complete scene with animations to UE4 as they are. I’d rather bake a giant Alembic scene for 5 hours in the background than manually have to fiddle with import and the gazillion of possible problems that come with compability.