Well, it's not at all equivalent to an AP, Cloudkey and SG, but they DO have a consumer product: https://amplifi.com/
Unfortunately details are sparse on their incredibly annoying, scroll-hijacking marketing site. But it seems to be a simple enough, plug-and-play mesh network setup, and the industrial design is quite nice. I think Ubnt just doesn't have the marketing machine needed to really push it in the consumer space.
I bought an Amplifi with high expectations, and my expectations were exceeded. The router is great, but my favorite part is the included smartphone app. It makes diagnosing network problems, enabling guest networks, figuring out who's using all the bandwidth a cinch.
As I write this, I realize it sounds like an ad, so for clarity: I'm in no way affiliated with Ubiquiti - just a satisfied customer.
Unfortunately details are sparse on their incredibly annoying, scroll-hijacking marketing site. But it seems to be a simple enough, plug-and-play mesh network setup, and the industrial design is quite nice. I think Ubnt just doesn't have the marketing machine needed to really push it in the consumer space.