O, I love this possibility, and this lethargy.
Lovely. :)
I will probably spoil the effect by admitting that the lethargy is in between bouts of hard work. A bit like Sherlock Holmes, who just lazed around the flat playing his violin or fiddling with his retorts when there were no cases....
At least in history, if you don't write a diss that might catch a publisher's eye, you have a hard time getting a job.
Do publishers regularly read or check up on dissertations? Surely not. You have to write it into a book first, don't you? And then perhaps shop it around to publishers, or whatever one does. My main concern there is that (aside from how worthy your addressing of current issues might be) is that shouldn't it be better to break new ground rather than rehashing your thesis and perhaps when you actually have the chance of writing a book that will be interesting for its breadth and its depth and make an impact. Otherwise it's little more than yet another hoop to jump through for the job market - you write the book to get a job, not because the contents are significant. Is this really the case?