In the long run Sony could still turn out to be the number 1 console this generation although its extremely unlikely. Even though I am an xbox fan its obvious that if the PS3 and 360 are the same price that PS3 probably outsells the 360 at least 3 to 1 which I believe would give it Wii type numbers. I really think that the Wii has started to run its course and will start trending downward very soon.
I also think that the 360 can end up catching the Wii, but again its unlikely, but I really think this generation will last a long time overall.
All 3 have had serious blunders this Gen,
MS - RRoD, Halo 3 launch practically bringing xbox live down to its knees for several days
Sony - High Price, E3 CGI Killzone video, DualShock 3, hyping games for years rather then months, online effort developing slowly
Nintendo - Supply issues with everything, (console, wii remotes, nunchucks, Mario Kart, Wii Fit), Friend Codes, storage, third party support
I've thought of a few and I am sure I forgot about a few, some issues have been fixed but they were still blunders
