As a Wii HD, it launched too late. Wii was losing momentum in 2010, and if console power and graphics were a reason for that [I don't believe so, but if], then a console of this power in 2010 would be a nice upgrade. The chipset is similar enough to be a Wii HD exactly: play your Wii games in HD and games come out that work on both. SMG2 and Zelda SS would have been great HD launch-window games.
As a new console, it launched slightly too soon to be competitive in power with PS4/720 for a price Nintendo is willing to charge, IF THE AIM IS TO RECIEVE ALL THIRD PARTY GAMES as it is. This doesn't matter at all if it was another Wii, relying on non-core audiences to carry it, but they bet heavily on actually winning some battles vs the other two consoles.
For the two aims Nintendo had for it, it is both early and late, yes. If Nintendo had adopted more of a Wii 2 than Wii HD strategy, the timing is irrelevant. Thus the big issue is with strategy and not timing or hardware spec.







