Yea, it looked quite good, but it's one thing to show a video and another entirely for gamers to have their hands on and be able to play it. Even if there's no visual cutbacks (something I doubt), what will performance be like? If they manage to keep most graphical details intact, what about the AA solution they're using? Unless Microsoft's team of engineers really helped Bungie work wonders on the game's code, then something realistically has to give.
I don't expect total parity in graphical details between the two consoles, as that's not realistic. The way I see it, even if most details appear more or less identical between the two systems, the fact still remains that be it in the antialiasing department or some other more obscure area, the PS4 will always have its expected edge. My real concern, though, is the same one I've had since launch, that developers under pressure over not hitting 1080p, will begin aiming for that resolution to the possible detriment of games on the Xbox One. I'm fine with the Xbox One not being as powerful as the PS4, but the last thing I want on top of that is for the system to needlessly be fighting with one arm tied behind its back when all that would be required is a simple lowering of the resolution. The games still look amazing as far as I'm concerned.
If the Xbox One beta looks as good and performs as well as it does already on the Xbox One at 900p, then anything less than that same performance and visual quality once the game moves to 1080p would be a major stepdown. So, I think this game provides us with a unique opportunity to make a choice on which was the better way to go. I'm betting when all is said and done, the game will likely have been much better off at 900p. Would love to be proven wrong, but I doubt it.