NintendoPie on 10 July 2013
3DS - Too high. The DS only had around 64 Million at this point in time. I'd say 60 Million at most.
Wii U - Too high. The Wii had around 19.8 Million around this point in time. I'd say 14 Million at most. (This is a comparison at the start of 2008, so the numbers that are used here don't reflect the second year of the Wii. Although my point still stands.)
PS4/One - Seems alright. Maybe too high for the PS4, and a little too low for the One. All together, alright. (I guess.)
Vita ---
Reminder: These estimates are pretty rough. I just did a quick look and only a little bit of "calculation" (lol) to get these. AKA, I'll probably be wrong on almost all of these. Minus 3DS, possibly. 
