Nothing's worse than buying new tech only for it to be obsolete straight afterwards.
A new Wii U game pad was sort of revealed recently.
Read about it here or just google it. http://wiiudaily.com/2014/12/redesigned-wii-u-gamepad-reveal…
The game pad comes with the console so if you got an old one you can't really replace it.
Apparently the 3DS XL was leaked in the same way as this.
I wouldn't be surprised it it's real, especially given Nintendo's struggle with making the system appealing.
That video is six months old. Nothing to see here, it's just some misrepresentation.