Something to keep in mind is NGFW. Ubiquiti and Meraki, for example, are NGFW.
It looks like much of the market is already starting to cool on the UTM crazy and NGFW is taking off as the "next stage" of popular approaches. Basically a reversal of direction or marketing at least, even from the big players in the UTM space like Palo Alto, Fortinet, Cisco, etc.