LMS on latest ReadyNAS products?

I think you might have an incomplete understanding of what LMS actually does.

A digital music system has to do three basic things:

1. Manage music files.
2. Present a user interface.
3. Play music.

LMS handles all of #1 and #2, and much of #3. The Squeezebox players don't really do much on their own; if you remove LMS, you won't be left with anything useful.

An analogy:

LMS is like a radio station that plays songs requested by telephone, and the Squeezebox or Wandboard player is like an FM radio in your house. When you say that you can add a touchscreen to your Wandboard and forget LMS altogether, that is almost like suggesting that you could add a telephone to your radio and forget about the radio station altogether.

You need LMS, or something very much like it.

Also, I wasn't suggesting that an Android tablet could replace your Squeezebox player; in my system, the tablet is simply a portable controller for the players -- like a Squeezebox Touch screen that I can carry around. Music still comes out of the Squeezeboxes.