So, basically a pre-made wash in a bottle. Between the Vallejo washes and the Promodeler washes, I think this has been covered for awhile.
Besides, it is Tamiya, there will be something wrong with the label and it won't be able to be had in North America for the next 5 years!! 
Actually I don't know if they can sell these in the US/Can anyway. These washes are enamel based and as far as I've ever been able to find Tamiya has never offered their enamel line in the US/Can, only their acrylics. But I do have all three of these Tamiya washes and the labels are both in Japanese and English so who knows. If you live in the US though I agree with you in that you really don't have a need of these. But here in Japan Vallejo is not easily found and more expensive than Tamiya/GSI Creos (400￥/bottle vs. 110￥). Also these aren't really such a new thing. The most popular wash method here has always been to use Tamiya enamels so Tamiya just did the smart thing and pre-made some and threw it in a bottle.
I'll also add that the Shizuoka show was great this year! I have some pictures but it is mostly of the 1/700 stuff with a few cars/planes/gundam here and there. You can also stop by Tamiya Headquarters during the show which is always fun to see. They have a museum, some demo workshop areas and their own store with everything 30% off (they have a store at the show too but not as well stocked as their HQ). Can't wait to go again next May!
