Most people aren't annoyed because the game has been downgraded, they're annoyed because they were told a couple of months ago that it definitely wouldn't be.
I don't think many people would be too bothered if CDPR had come out and said "during our development it's become apparent that we don't have the resources to create/the game performance is unacceptable/insert valid reason here to keep the graphical quality as high as planned, but we're looking at an enhanced edition at some point in the future".
That's fair enough, but jeez the reaction from people you'd think the developers had come round and slapped their mother. So the graphics are going to look a bit different to what you expected.....well, by all accounts so far it is actually going to look pretty damn good on a decent PC. Enjoy the game!
...and don't pre-order games games on prototype footage....I really don't understand the thought processes that lead people to lend publishers interest free loans anyway. There is no upside for the consumer, only risks! Wait til release when you know exactly what you're getting.