David Bowie, the man, the human being, owes us nothing. Nothing. No artist owes us, the fans, anything. Bowie's strength has always been in defying expectation, not giving people what they want. If he wants to stay out of the public eye and spend time on his family, he has every right to. No actual anticipation is being built outside of the die-hard obsessives, who would probably expect nothing less than the second coming of Jesus Fucking Christ if he were to start recording another album.
Especially if Robert Fripp were on it.
I mean, just in case he's reading this, you know. That'd be nifty.