I'd like to believe we could realistically see these kinds of engines soon, but I seriously doubt we will. There are a bunch of flags in that video.
For one, they never tell you the specs (even relative) of the pc it is running on. Yeah, maybe they are getting 20 FPS. And maybe its using a rig with 4 GPUs. That's kind of a really important thing to specify.
Plus, they are getting 20 FPS. He mentions that newer versions are seeing higher, but doesn't really specify.
They ALSO don't demonstrate how it would be able to scale with systems. One of the really useful aspects of polygons is that their number and the textures on them can be reduced to lighten the load on your system. We've yet to see how that will be with a particle-based system. You can't just cut the number of particles, because they are integral to creating a solid image. That means that you'd probably need to create different models of everything to reliably allow for scaling according to power. That's at least tripling developer workload. Not to mention the fact that this would probably be more difficult to work with.
Maybe I'm completely wrong about all this, but it's what I suspect. That's not saying we won't see particle-based engines in the future. I just don't think it'll be the immediate future. Until at least lower-end gaming rigs (and the current gen consoles) can reliably support it at least.
Anyways, you all are horrible, @#%^ed up people
Never underestimate the healing power of a massive dong.