I may write a detailed review later. I probably won't.
3DS: Lots of fun, great games, a little clunky. Poor battery life. Love it.
PS Vita: Really capable, lots of funtionality, good games. Love it.
Wii U: Great controller. Best web browser on a console. Miiverse is great. Love it.
PS4: Great controller. Lots of power. Some decent free games. Love it.
Xbox One: Kinect is great. Great controller. Feels really well designed. Love it.
Pretty much, if I buy it, I love it.