I played the 3DS demo and I'm impressed. Not impressed in sense of "GOTY", but I was expecting a less worthwhile game, but this turns out to be - for me - the best installment since Sonic Adventure 2: Battle. So I'm going to buy it (on Wii U). Well, this time it wasn't Sonic Team screwing up.

I liked what I have seen, not a classical Sonic game, which actually a plus for me, graphics are decent but not sure about framerate, gameplay lets you explore and navigate not run to the finish. I will keep an eye on it.

The video is interesting but I really don't like the player's comments.

I think we have conflicting information, then.  This guy seem to have been playing solo and apparently the framerate is a disaster in that, too:

http://www.neogaf.com/forum/showpost.php?p=138142513&postcount=610

http://www.neogaf.com/forum/showpost.php?p=138160564&postcount=788

Anyhow, I can confirm that there are absolutely framerate problems even in single player. The game opens with an autorun section, and it was crazy choppy. The subsequent 3D section chugged pretty hard, too, although not as bad. 

The game gets off on the worst possible foot with it's intro section (the part I played earlier). It's primarily four very tedious, very blocky 2D segments, with a couple of combat rooms and two autorun speedway bookends. It makes for a terrible first impression, especially because it has some atrocious performance and framerate issues. (And also my aforementioned cut scene glitch.)

This segment would be really fun, except that the frame rate during part of it is such a disaster that it becomes almost unplayable.

It looks pretty bleh.. :/

Too scared to watch this for now. :(

I wanted another Sonic Colors. This looks bad.

So, only Nintendo is confident in their product? =P

Because i know Ubisoft didn't lifted watch dogs embargo until the release, and i believe many others followed this "strategy" this year.

For now:
Assassin's Creed (1 day) - No review
Dragon Age 3 (7 days) - No review
The Crew ( 21 days) - No review
Far Cry 4 (7 days) - No review
Watch Dogs Wii U (7 days) - No review

I am not sure, but anyone knows about Driveclub and CoD:AW?

Sonic Colours on Wii had better graphics than this.

(Then again, it had better graphics than Lost World too...)

Better quality playthrough without the annoying commentators:

https://www.youtube.com/watch?v=BUbroCiXtSQ

It's pretty impressive that they managed to make such an awesome-looking Sonic game on the Wii though!