I think yes, if by only console you are not counting PC games.... I love the Wii, but a core gamer would need some hd love on occasion.
If you me including PC... then No, I though all core gamers need to be PSWii or Wii360.... Or all 3.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut