Not that I doubt whether CDProject Red will deliver a fun and playable product when the game finally launches, but you honestly have to wonder about that 20 minute gameplay demo from over two E3's ago. There is no way that was actually gameplay and in all reality was a tech demo whipped up just to test the water. Has there even been any real gameplay demo's since then? If so, I haven't seen them. And if that's true, then we don't really know as much about this game as the hype would suggest. Don't get me wrong, I'm no hater and really want a good game here, it's just that I'm mystified where the hype is coming from in the absence of real solid news.
I can only speak for myself of course. I have very high hopes for this game, but I'm keeping the actual "hype" in check, because like you said, we know next to nothing about it. The reason why I have high hopes for this game is not any teasers, trailers, Keany Reeves appearances etc, but 100% based only on their past products, namely Witcher 2 and 3, both which I loved, and CDPR's proven history of loving their own products, their attention for detail, and their detailed world and character building, their historic strive for making more than "just another game".
Anyway I'm not expecting the Holy Grail, "just" another great game world with great characters and stories. There will certainly be the day where CDPR will disappoint me, but so far that day hasn't come
I'm hoping will won't come this time either.