If you've played Katamari before, you know what you're getting into, if not, it's simple. Either way, it's awesome.
Beautiful Katamari is no different. You are once again the prince and the fabulous King of all Cosmos gives you the task of rolling crap up into a ball to make stars again. I wonder what the original japanese story is (in the first one the japanese game had the king getting hammered and knocking the stars down) Anyways, thats it. The end. You roll stuff up. Sometimes you'll have to roll up stuff to get it to a certain size or you'll have to roll up certain things. Either way it's fun.
New additions to Beautiful Katamari are downloadable content and online multiplayer. The DLC is stuff like presents new cousins (playable characters) and most importantly stages. You're going to need to download the stages if you want to get all 1250 of the achievement points. Online is just like the offline component of the game where you just roll around seeing who can make a bigger katamari and so on. The online lobby is a lot like Dead or Alive 4s, where you have your little avatar and can run around pushing balls and stuff. The controls are well translated over to the 360. Some PS2 Katamari players were skeptical as to how the dual analog control would work since the sticks aren't right next to each other, but I can say after playing a while you don't even recognize it. The one bad thing for the controls are, for a simple game they're complicated and can be an annoyance for new players. But that being said, once you get the controls you really GET them.
Visuals are pretty much the same. It doesn't "look like a 360 game" but then again, Katamari never will. Katamari isn't about high res textures and all that, its about funny weird colors and blocky looking people. So you can't knock the game on graphics (it is HD though)
Audio, is amazing. The soundtrack has a bunch of new songs that are just ridiculous and fun. Katamari games just keep on pumping out more and more crazy audio for them.
In the end Beautiful Katamari is really just another Katamari game, but that isn't a bad thing at all. The score I give this game is completely irrelevant to the amount of fun I have with it. This is one of my favorite 360 games, and the score is just a technicality.