Well, I wasn't trying to over-sell the Wii U - but it was definitely a Prototype for the Switch - that's practically undeniable. Especially when you look at the Wii U prototype [1]

Range on the Wii U is terrible, and the Switch is an "incremental improvement" in that regard :p

Battery life between the two is about the same, with the Switch gaining range

[1]: http://nintendotoday.com/wp-content/uploads/2012/12/slide002...