This isn't a brexit blog but one can hardly forbear just now. IMHO there is a very early dividend from Bolting Boris: the threat of a Close(r) Run Thing will force Cameron to do even more in the next four months. This will include holding the line against the inevitable nibbles, backtracks and 'clarifications' the Brussels elite will be plotting; it may even offer possibilities of getting a few more crumbs from their arrogant High Table. But that's all just noise.
The real dividend will be that Letwin's Sovereignty Bill will be made as substantial as possible, short of actual UDI. Given the EU's "concessions" aren't worth the paper they're written on (or indeed not written at all), this may be the only thing of substance we'll get out of the whole charade. So it wants to be a good'un. Notwithstanding Letwin is a clown, it can't be beyond the wit of man to deliver a pretty juicy Act under this heading, maybe enough to sway plenty of folks.