The reason that Breakfast With The Beatles had to change into a British Invasion show in the first place (it was on Underground Garage) is because the rules changed. Only two songs by the same artist can be played in a single hour, only so many total in a multi-hour period, very limited back-to-back plays etc. That is, unless you get all kinds of waivers, which the single artist channels obviously have.

I suspect SXM has been working on making this happen for a long time, and finally all the stars aligned. 

Now that the Beatles have done it, I wonder if the Stones will be right behind them?

but it's still brilliant.

Someone did the entire Sgt. Pepper's album as a Star Wars parody...