What's interesting about this device is that it (supposedly) learns how apps work and how people use them, so if you ask it something that requires using an app it could do it.
So while it might be "just an android app", if it does what's advertised that would be impressive.
Apps are designed to be easy to use. If this device works as advertised (and that's a huge if), then it wouldn't offer much in the way of convenience anyway. From what I've been reading, it doesn't work well at all.
Unless you have tons of money, why preorder? Just wait for the company to inevitably go under and people start reselling their now-useless devices, and then scoop as many as you want from Ebay. Even if the company survives for a while, the functionality is so underwhelming they might start getting rid of them way sooner.