The Wii U comparisons are kind of dumb. First of all, the Wii U gamepad uses its own Wi-Fi protocol for low latency transmission when communicating with the console. Case in point, you don't need an internet connection to use the thing with the console. Meaning, you can literally use the gamepad in tandem with the console offline. This Acer device is a localized, bog standard, streaming device. You have to have internet connected to this device to use it for any streaming. Remove the internet, you basically have a partially expensive paperweight. It's only going to be as useful as the hardware that's baked into it, with the little operating system functionality that's there, which isn't going to be much due to the alignment of the device being primarily for streaming. At least long term, your Wii U gamepad will still work in conjunction with a game console, and you won't have to suffer with internet related problems. Your internet is prone to going out and what not, which effectively is a hassle on the experience when using streaming devices, especially if you are in-game already.
Internet shenanigans with a streaming oriented device, sounds like a blast, so much so I forgot to get excited.
I personally don't like streaming devices like these, since offline usability is basically shafted. I view online functionality as a sort of bonus that's nice to have, but it shouldn't be the identity of a device, due to all the flaws, especially long term. What we should have gotten is a genuine handheld that can be used offline, as well as it can be used online.