Joshua>My preference is for RST to win simply because of the lower entry bar, but ... *shrug*

One might think you-all would ask DPers what they think about all this. 

I think what they would tell you is that:

“Most people write in HTML, and a few write in RST, and DPers really don’t like either epub nor kindles because that’s just poop in the party, and what kind of stupid smack are you guys talking about when it comes to inventing even *more* bizarre languages?  Don’t you realize how hard we work to try to keep the PP’ers we already have!?”

That said a number of DPers “get” EPUB as a “real book” source language and are pushing to make that happen. Just like the big boys.  DP’ers who learn to EPUB might actually be able to get a job and do something real with their skill set. Even knowing Sigil is enough to get you somewhere nowadays.