Back on topic...
looking at the TakaraTomyMall listing through google translate, and it says that there will be a lottery drawing for the $400 toy-n-watch, but doesn't say how many they are making. People can "pre-order" during November 19th (today) to November 22nd (just 3 days), and the drawing will take place on the 30th, with the toys sent out from December 8th.
The non-watch version is probably not limited, and not exclusive to TTM, but I haven't been able to find it listed yet on JP sites. (maybe the non-watch version is just for Asia, outside of Japan)