The Nintendo equivalent to a VitaTV would actually be something like this:
Wii HD (Micro)
- Miniaturized Wii chipset (perhaps emulated by ARM processors), console is tiny, no disc drive, digital download only.
- Plays Netflix, Youtube, Hulu, etc., new media centric OS.
- Uses the Wii Remote
- Download Virtual Console games and Wii games up-resed in 720p HD.
$129.99 with Wiimote (no nunchaku). I don't believe Nintendo would ship something without a controller.