This year:
PS3 surpasses 360. (It'll happen sooner since Wii U won't outsell PS Vita unitil Christmas season unless Nintendo slashes its price soon)
Wii U surpasses PS Vita.
2014:
PS4 surpasses PS Vita.
PS Vita surpasses Dreamcast. (If that doesn't happen it will mean PS Vita is no longer in production)
2016:
PS3 or 360 surpasses Wii. (It will probably happen sooner (2015) thanks to worldwide appeal and emerging markets)
PS4 surpasses Wii U. (Is it really possible to bomb harder than Wii U?)
Never:
Wii U surpasses PS3 or 360 (Wii U will be lucky to sell 30 million units lifetime)
PS3 or 360 surpasses Wii (No chance in hell)
Edit: My forecast is based on shipped units.
I apologize in advance for my bad english.







