I'd give it 10 more years.
I've met DB 4 times, 3 times after his shows, and once after his powerpoint show.
Each time I've chatted with him I've never brought up the TH topic. But one time whilst I was waiting to have a chat/get a CD signed, another, much bolder fan got right in his face with "Are you gunna work with Brian Eno again?" and he kinda irked and got uncomfortable at the question..and muttered something like, "Hmm, I dunno" and obviously didn't want to talk about it.
I'm a musician and have played, recorded and toured with something like 10 bands, going as far back as my senior high school years. DB said something in the David Bowman book like, "TH's music came from camaraderie and friendship. Once you stop hanging out, you may as well be making music with anyone." And I think it's hard to understand how true that statement is if you haven't played in a band; it's a bit like a marriage - once you break up, you really don't want to go back. I had a great original band back in the 90s but things got tense, we all stopped being friends and rehearsing, gigging and recording became a really unpleasant experience. Recently I've had fantasies of putting that band back together but it just can't happen - the same dynamics and problems would re-emerge.
I love TH, especially their live performing. But I think DB will hold firm. Although maybe, just maybe he won't feel irky or uncomfortable in say 10 years time. He was uncomfortable about the Eno question only afew years ago, and now we have "Everything That Happens Will Happen Today"....I love David Byrne, he is by far the greatest artist around; and he's always moved forward, tried new things. I think he'll need the perspective of many more years before he might "hang out" and tour with his old band.
Either way, imagine how terrible it would've been had TH made "Naked" and then all of them just stopped completely. It's a great thing that DB, Tom Tom Club and JH solo has happened and is happening today.