Hi Poul,
If anything I would say that NetTalk will likely consolidate towards a "single" framework, which may ultimately be a combination of jQuery and Bootstrap. I'm more inclined these days to make jQuery Desktop work well on mobile devices than to keep multiple frameworks going. jQuery Mobile is nice, but it's a lot of work to make, and test, everything in multiple frameworks.
More recently (and we've covered this in various recent User Group webinars) I've looked at ways of designing for desktop, but in a way that works well on mobile screens. That effort seems to be bearing fruit so is likely the direction we'll go - at least for the next while.
Cheers
Bruce