The .1 difference between the 360 and Wii seems to me is Japan. Wii is 2nd to the DS over there, and the 360 can't be given away.
With the PS3 sitting at 600 USD (Not to mention more expensive everywhere else in the world), its going to play catch-up for a while.
*Puts on devil's advocate hat*
I'm still skeptical that devs and pubs will jump on the Wii. even though this gap between the systems will no doubt widen. If you combine the PS3/360 numbers, that's 12.6. Someone like Namco, Capcom, Square-Enix will put their flagship games on both systems, while the Wii will get the
good side projects. My circumstantial evidence are the previews I see in gamer rags that 90 percent of the time are PS3/360. PS3/360 won't get exclusive bragging rights like they did in the past, but by combining the two markets, they have better chances of breaking even/making a profit.
Long story short: Don't hold your breath for RE5:Wii Edition

*Takes off hat*
Yay for Nintendo. NCL/NOA/NOE should pop some expensive champagne, or overpriced liquor normally seen in
bad hip-hop videos...