The only one I am mildly interested in is the OUYA because I see potential in it to succeed as a micro console. The Nvidia Shield is ugly IMO and because of likely unappealing price and Nvidias own hand, it will fail to do much.
e=mc^2
Gaming on: PS4 Pro, Switch, SNES Mini, Wii U, PC (i5-7400, GTX 1060)