I've seen commercials for both of the current Nexus phones, multiple times. The worst were the 6P commercials while mine was out for repair.
I actually became a Samsung fan because (or in spite) of the Galaxy Nexus. I was impressed with SOMETHING about that phone. But, I got to a point where their added "features" were getting in the way of how I use the device.
I think these newer Nexus phones would've done better, unfortunately, if they had been available at carrier stores. Sure, Best Buy eventually started selling them, but I feel like the vast majority of average consumers still goes to their carrier store when it's time to upgrade their phone.
This was the same concern I had when the Moto X went the same route. I love the idea of buying an unlocked device outside of my carrier. Aside from specs, it's what interested me in the X and what eventually led me to buy the Nexus 6P. The average consumer, on the other hand, is going to go to VZW, AT&T, etc. and rely on the associate there. Even with the commercials, most people have no idea how to buy a Nexus phone.
I think (HOPE) we're in a transition period where manufacturers can get away from carrier specific devices. Moto did it, Apple did it, but Sammy didn't. I'm very disappointed they stuck with the carrier model with the S7s. At this point, they're impeding progress. If Apple and Samsung both offered their devices direct and really advertised it, it would've been a great push.
That said, I know we all know that Apple's selling phones direct now, but does the average consumer? That's not something I've seen a commercial for, so I'm willing to bet that the average person who wants an iphone is also still going to their carrier store.