They didn't have the new gameplay from this year on the show floor. It was another private audience showing that they are going to doctor up and show to the public at PAX.
Without a source, your claim isn't credible. Considering they are doing the same this year as they did last year, the pattern suggests it was entirely intentional. Nothing else to suggest otherwise. The public cries to see stuff all the time, but get nothing until a company is ready. Hell, people want to see this years gameplay but are forced to wait months. I don't think your claim is correct
Unlucky for you, I got nothing better to do today, so let's keep discussing this! And just so you don't get me wrong, I'm not trying to be rude or anything, just me that has a different mindset than you on this subject. And I am bored, so why not spend some time writing.
So, first of all, the demo is almost the same on the floor and in private. The differences are that the private one is live and the change in character specs on the fly. Other than that it's the same from what people say. We don't know if we get the gameplay where they change specs or if we get the one that's just one. Still, everything else is the same. Of course the demo gameplay can be doctored so the graphics looks better and it runs better, but why not just trust them? Have they lied before? If so, when?
But if we go from that they are not lying to us, this gameplay is how the game looks like if we got the game today (still a year to go).
And about the gameplay we already got, I did a fast google search and even if I try to get info from last year I only get info about this year and this demo... Don't really feel like spending all night trying to win that argument, so you can't prove that it were a plan and I can't say it weren't. The only thing I found was they saying that they did a private demo because they want the public to see a better version of the game. But you can turn that to means doctored video and I can say it means it wasn't planed to be seen by the public.
So on that matter nobody can win until they go out and give an answer. And on the matter of if it was doctored or not, well if it was, why would they have bugs if they want it as perfect as posible? So the gameplay we saw was most likely the gameplay you would get if the game was in your hand that day. And some bugs for a game that won't be out for two years at that point is nothing. If the bugs are still in the game when it comes out, then I would understand if you complain.
CDPR is not like most companies, they actually listens to the people, so I would not be surprised to hear they gave us it just because we really wanted it and it got so great feedback from the people seeing it in private.
But hey, it's just opinions and speculations