The Sony ZX2 (on the right) Walkman will cost you a cool $1800 ($1200 more than the previous Sony NW-ZX1).  Its based on a modified Android OS based on what I saw - definitely not Lollipop.  The demo unit was locked down, but I was able to hear a few demo songs from Sony's hi-resolution music library. What was interesting to me was that at the $1800 price point, the description label called it near hi-res player.

It sounded about as good as I could possibly get in such a loud listening environment with people surrounding me listening to Sony's other audio products.