Sounds really nice, though its not a usable product yet.
I wouldn't wait for USD to become a widespread and stable technology if they even release it in the near future.
I can only see the benefit of USD if all the 3D tools support it aswell which will also take quite a while after the release of USD I guess.
I'm also not sure if VVVV would be utilized for such complex scenes. I mean Pixar thinks in whole other terms when it comes to 3D scenes, these guys render days on a frame with billions of polygons and thousands of assets.
In that case you clearly need a even more advanced format than Alembic if you want to send an entire scene like that to other tools.
Though for the VVVV world Alembic would do the job just fine imo, you can still export entire scenes with alembic, just not those gigantic and complex monster scenes.