no, things are not going to get interesting. I think it's pretty clear cut right now with Wii in 1st, PS3 in 2nd, 360 in 3rd (in japan). Not only that but there will be big gaps between each of the 3. 360 may outsell PS3 for 1 week when Trusty Bell comes out, but that doesn't mean they are gonna be a challenge for them. Also PS3 may outsell Wii the week a couple major releases come out, but it will only be those weeks.
currently playing: Skyward Sword, Mario Sunshine, Xenoblade Chronicles X