Pretty soon Wii developers wont have a choice but develope for 360 or PS3. There has been alot of talk about the sales of wii dropping and developers have to go where the market takes them. Unfortunately those developers that make generic games for the wii might not have a home with these two consoles. Maybe in the PSN games...who knows.
This is their first release on the PS3 and they had to build new engines from the ground, up. They will expand as they get more acquainted with developing games for the PS3, GOW 3 looks to be hype no matter how much of the systems power it uses, this only means future GOW tittles may be more advanced.