> Will you still play your wii?
Yes.
> Will it be any less of a console?
Yes, since a console is defined in large part by the games it has. If it stops selling, it will get less games so it will be less of a console.
> Will the wii be a failure?
Not if you consider Nintendo's pre-launch goal, but in today's perspective yes.
> Will it confirm that the wii is a fad?
Kind of.
It doesn't matter since the Wii isn't doomed anyway, no matter how much importance is given to sub-standard Japanese sales.
My Mario Kart Wii friend code: 2707-1866-0957