Overall, this display on the Vive Pre is much improved. The 'linen screen' effect is entirely gone. Colours are more vivid, the contrast is fantastic, and the screen-door effect is barely perceptible. I've only noticed the SDE when looking at large areas of solid colour, and even then I was intentionally looking for it.
While the hardware is undeniably great, the original Vive took a few hours to get it set up and working. However, the Vive Pre was set up in about 30 minutes, with only a few issues in getting one of the controllers paired. Valve have done a great job with the software, making something that could be difficult very straightforward. I've heard some developers have had a few problems, but my experience has been almost plug-and-play.
My only criticism would be the headphones. While they're good, I'm not keen on sharing in-ear headphones! Of course, these can easily be swapped due to the 3.5mm jack. It remains to be seen if this will be the solution in the consumer version.
Overall, the Vive Pre feels like a consumer product. I feel they could probably release this as-is.
How does this compare to the Oculus CV1? Well, I don't have one to compare it to yet, although the Oculus CV1 Kickstarter Edition should arrive in the near future.
Exciting times for VR!
Finally, BAFTA for scale ;)