This is certainly unexpected to have happened so soon, but I guess they wanted it to hit at a similar time to the blue suit Tenth Doctor release. Which makes a certain kind of sense from a marketing point of view.
I'd already decided that I'm a big enough Doctor Who tragic that I'd grab the 9th or 10th Doctor TARDIS, whichever gets made first (the variations between each are pretty minor, all in all) so I'm down for this without regret, even if I didn't expect it quite so soon. Where exactly I'm going to put both TARDIS', that's going to be the real trick.
In fact I'd also grab the '76 TARDIS, and probably the JNT era TARDIS as well, but I think that would be a fairly good covering of the most distinctive variant looks over the years, so even I'd draw the line at that point. And just not any time soon, hopefully.