Lots of motion capture and computation to move closer to reality. Synthetic images are getting impressive (but not synthetic voices) - Masahiro Mori would be impressed.
Greg recommended the powerful imagery of Alexey Titarenko - amazing, almost dreamlike stuff!
About the same time Jheri pointed to the "dancing video" that is making its way around. Take a look if you haven't seen it. A simple idea capable of bringing joy.