Ofcoure xbox arcade is composed of casual / low budget gameslike the psn, yes. But also they are pushing the boundries of what you get for 15 bux.
And too say the best xbox games are third party is a matter of opinion, dont pass that on like its fact. My favorite games are Halo, Gears, Forza (not fable) and a bunch of others that are first party. MS takes many risks, just look at the entire Kinect Line up. Hundreds of thousands of people bought SW kinect (i was not one of them) and alot of people enjoyed. Those are not the types of people to head to an internet messege board and complain about the game or even go read a review on it.
Im not sold on Kinect by a long shot but i have to give them credit for trying to be innovative, Star wars kinect, Stell Battalion, Fable the journey, all games that are simply not possible without kinect. Whether they deliver is another story. atlast they took the risk.
I like what MS is doing with their portfolio. They want a Diverse Library of games. If xbox owners can get an experience witha multiplatform game, then why would MS go into development in a game of the same calibur and just keep it xbox exclusive. Doesnt make sense. there are so few original Ideas no a days, id rather them take there time and find a truly innovative product. (example being how MS was to purchase crytek and decided not too due to the fact they were working on crysis 2. Theydidnt need another sci fi shooter, they had halo)