The Wii will reach 150 million by the end of its lifespan. If Wii continues to sell over 20 million units a year. Why should Nintendo abandon it? They should continue selling it and releasing cheaper to produce non HD games. How much time and money would it cost to produce a Wii game as opposed to a PS3 or X360 game? I bet it would cost like a fraction of the cost of a X360 or PS3 game. By the looks of some of the games released on the Wii it would take maybe a few months to produce a game.
I reckon Nintendo should say screw Hd gaming which is expensive. The Big N should continue on releasing tons of games of various quality ranging from amazing to crap.