Seems to be an overpriced gimmick router. Generally if you spend a lot on a router, you likely have other higher end systems, There is no motivation to use the router for running random android apps (imagine if something like that gets infected (since android is more full featured, it is a huge target, and outdated versions of android are not likely to get any kind of security update, Due to the update cycle of android and abandonment of older versions, how long will this company actually support the router?
If your smartphone gets infected, then the attacker gets access to whatever is on your smartphone, if your router gets infected, then the attacker can access all all that is saved onto the router, in addition to having access to all of the traffic on your network, meaning they can do sidejacking for when you head to your banking site, alter DNS settings to ensure that you use their phishing sites, access all local resources in addition to access to ports that will generally not be accessible over the WAN.
The reason why android for router projects failed in the past is because it is a nightmare to secure long term. The more common router firmware, is generally a heavily stripped down linux distro with only the mare minimum code needed to provide the desired routing functions, this allows a router to get away with 2556MB of RAM (android 4.4, can pull nearly 500MB of RAM just on its self, in addition to doing random periodic crap in the background which on a android phone, will mean that a certain task takes a few extra milliseconds to do, On a router, that same action will mean that you get a lag spike in your multiplayer game, or a huge throughput dip (especially if you use QOS)
They partially skimped on the wifi in order to build in a cheap android tablet and still have a huge profit margin.
(also how convenient would you find your current android or iOS tablet, if it had no battery and needed to have at least a power cable and an ethernet cable connected? )
It is likely a better value to have a separate android tablet and router, and thus get 2 devices that do their own thing far better than the all in one that compromises in both areas.