Minecraft already pretty much works like that (albeit textured 'voxels' rather than per pixel voxels). It's ample demonstration of how much resolution you can really get in a practical situation.
Except Minecraft is all about modifications to the game world, which is kinda impossible if your entire tech is built around a static, highly optimized hierarchical dataset... There is probably a good reason why Notch called this stuff a fraud.
If Notch somehow got behind this it would generate millions of interested people Think if he started developing Minecraft Unlimited based on this sort of voxel technology, it would immediately turned everyone's head. Nobody is going to ignore something like that if Notch was behind it. Now the perfect way to get it done…
Putting a point cloud system into a traditional game engine would probably be the best approach to accomplish their goals. It's not too far off of Minecraft putting voxel data into a game engine. It seems like the biggest hurdles of sparse voxel octree, my guess at what they are using, is storage and internet speed. Even…
But it's not a 'road less traveled'; it's really old tech that lots of people have been using constantly for ages. Heck, since Minecraft came out voxels have been all the rage. All they've done is changed the name for marketing spin (which, clearly, worked very well). If they were serious they'd be releasing white papers…
... screen space AO is cheap and consistent because it is a post process - it is based on existing passes (the screen space normals and Zdepth of the scene being displayed), not on thin air. And the reason why it is cheap is that unlike "bouncy" AO, it uses 2.5D tricks to achieve a cool effect. Following your logic, this…
Most of the answers to those questions are "it depends, they haven't released much more than razzle dazzle videos". 1) There are all kinds of ways to paint on meshes and transfer it to point cloud, colors and all. The problem becomes storing a wide enough pallet per atom to make the item visually appealing. Noss, or Natch…