How does this work with packages like TiKZ or TiKZ-CD? Right now I’m perfectly happy with auctex and aquamacs, but if this did real-time tikz rendering then I would be sold.
By the way, if you're using tikz-cd, you should check out http://tikzcd.yichuanshen.de. It's not really complete enough for a final version, but I appreciate being able to put a quick backbone down and then edit later.
The PGF system required by Tikz/Tikz-cd/Beamer/Pgfplots and a number of other packages is fully supported. You can edit your figures in realtime.