I think there have been about 300 threads on this forum that have declared this same idea. It has been the mantra since before the Wii launched. Nothing has changed, except that the prophecies of wiidoom have failed to materialize.
Gran Turismo's thread adds nothing to the table that hasn't been discussed ad nauseum. The only thing different this time is that this post derives from Fanboy Turismo, a well known damage control specialist.
We could all spend all night (or day or morning, wherever you are) discounting this thread, but ultimately there isn't a real reason to. It's been done. We're moving into the holidays and the wind is , for better or worse, at Nintendo's back. This might be a good thread to bring back in March '08, but I'm sure in the meantime 300 more will be created just like it.