It's much better than DK2. Believable presence. They showed a series of scenes, about 10. Some of the scenes were quite impressive. Much harder to see the pixel now than DK2 (its still somewhat visible)
Any word on whether this is the final iteration between DK2 and the consumer launch? I'm debating whether to get the DK2 now, or just wait until the thing is launched.
This is simply an iteration. They mentioned that they had some things to fix, so there will definitely be more work done before the consumer version is ready.
If you're not actively wanting to develop for the rift, wait. The current version is flawed in many ways and definitely not consumer ready. The biggest reason to wait however is that the first generation of VR content simply isn't finished yet, so you'd get the hardware and most likely quickly run out of experiences. The consumer version will be much better, and will actually have content made for it upon release.