Wireless Ipad switch / Wii U streaming questions.

A bit random, but does anyone know if you can buy a wireless power on/off switch for an iPad with some kind of receiver attachment? Also, can you set several iPads, say 3, in an array and extend the screens?

What is a Teradek Cube-250 exactly? I understand that it has HDMI IN. Does that mean I could connect an Ipad to it in the likely case the latter does not have HDMI IN via WIFI and then connect the encoder device itself to a Wii U with a cable?

Could I stream game-play to a iPad or any other tablet using this method?

If so, and this is a long shot, any idea of where I might be able to get one for the best price?

Oh and is there a noticeable latency difference when using a HDMI splitter?

I hear by using an active splitter you run the risk of frying your equipment so it's safer to use a passive splitter. Is this true? What are the pros and cons of each?