Personally, I'd like to see John go back to "normal" gigs, next time round. I can't help but feel that his latest work (From Trash & Sideways) has been overlooked and underplayed, especially since the re-release of Metamatic and obviously, the tour.
Metamatic stands alongside albums such as Telekon and Replicas, as pioneering works. The Garden - great though it is - doesn't have such a status, and I'm not sure if there would really be a 'need' to play the whole album live.
Of course, it would be cool if he did - but then you could also say, why not play Shifting City in its entirety, or any other of his albums. I think as a one-off, it is good. Too much, as newvox says, might not work. If there is one John Foxx album that deserves the "live in its entirely" treatment, then it is Metamatic.
I know I am being critical/objective though. We all know, whatever John decides to play live, we'll want to go and see it!!
I do also think that John's full live shows of Cathedral Oceans and Tiny Colour Movies (even though I'm yet to see the latter) do work a treat, and will outlive the current trend of playing an entire album live. I suppose they serve more of a purpose.