I doubt there will be a stalemate between the wii and the ps3 in Japan. Both consoles will have spikes during big releases and dips when there are few good games releasing.
However in the long term there will also be other factors like price cuts, colours and hardware revisions. Ultimately I think there is a chance that both could be successful over the next few years. Over the last 2 years the Wii has been more so but it's very hard to predict what will eventuate at this point.
Hopefully they will both have much success in that region as the last thing we need right now is for the Japan home console market to shrink any more than it has.







