Outside of the Samsung, players didn't really start coming out until June, so that 100K number shouldnt really be thought of as sales for the full year. It also doesn't take into account the XBox One S...
A few random thoughts:
4K discs are selling at a healthy rate, a rate higher than Blu's first year. I think you seeing titles not moving in stores has more to do with people buying online rather than going in Best Buy.
Prices are high and selection is small? No kidding. It's always like that...