Meraki has been talking for a while about ‘smart’ services to complement SD-WAN. Things like monitoring of SaaS performance and exiting via the best MX, whether that be the local MX or another with a better connection somewhere else on the network. Then recently there was the Thousand Eyes purchase by Cisco. You get the idea of where they’re likely going.
It wouldn’t surprise me, although I don’t know for sure, if it’s related to this. I also wouldn’t be surprised if whatever it turns out to be is only available in the SD-WAN Plus license, since you’re going to need some kinds of performance monitoring, and that’s what Meraki Insight does.