Whoever here is saying that there's no difference between this and Genesis, or that you can achieve the same quality with filters added to the Genesis games... Seriously, get your eyes checked. If you aren't just trolling and you really think that, you're in need of serious optical help. Really, i'm actually worried, no kidding.
Lets do a quick comparison. I'll post three screenshots. All three are the same scene from the same game. One is the original Genesis Sonic 2 at original resolution and no filters, another is the original Sonic 2 upscaled to @1024x768 and with the HQ4xS filter (via Fusion), and the last one is the new Sonic 2 HD remake running natively with all art designed specifically for 1080p. Here we go, i shall spoiler tag these due to bandwidth reasons-
Sonic 2 original (no filters, original resolution)-
Sonic 2 upscaled to 1024x768 with HQ4xS filter-
Sonic 2 HD @1080p-
Even without the HD, this remake contains totally redrawn art. It doesn't suffer from the sprite and color palette restrictions of the Genesis. Nor any of the other restrictions the Genesis had. Saying you can see no difference between this and the original game is either foolish, trolling, or disturbing (disturbing since i'm actually worried that there may be something serious wrong with your eyes.
On topic- I'm rather disappointed that all we got is 10 seconds of footage and 2 ingame screens. The trailer looks like stock Sega PR, hyping people up for nothing (though at least THIS game looks and plays good, unlike their own efforts). Having kept up with the main site for a while and the development process, they had a huge countdown and revealed very little. It was actually said that they would be releasing a playable demo when the countdown ends.
Admins over at a certain Sonic site (won't name it, it's got roms) are furious about the developers having lied to them to get free press and bandwidth. Also, for being a community project, the leaders are apparently screwing over the people who helped make this game. This game is on shaky grounds. Just wanted to give you the heads up, we may never actually see this game in a playable form if the hate keeps up. There's a huge pissing war going over at the site right now between the site admins and the project leader. Just wanted to let people know that there's trouble behind the curtains. I'm rather worried about the future of this project.
Oh well, if all else fails, we still have Fan Remix, which i figure i'm much more of a fan of than this one (though this one looks great too).