Thanks, we are not entirely convinced if a 1:1 relationship of process to DOM element is going to be where we land ultimately but it most definitely is a fun and interesting experiment. And it does align well with many of the OTP concepts. It really comes down to performance numbers and further research to know what the best direction a rendering engine should take. Personally, unless a rendering engine in Lumen is doing something OTPish (i.e. supervisor trees) I don't see the reason why people would choose a Lumen solution over existing works. I think I mentioned it in the keynote but the performance is secondary to the architectural perspective that Lumen can bring to client side development.

As Lumen continues to develop we'll continue to experiment with ideas and see what works best. I actually have a dbmon demo built but Hans and Luke were hand compiling the source and the DOM ast was just too much which is why the presentation had a very simple div/p tag. Once the compiler is ready for use I hope to write more about the dbmon demo and show of some crashing table rows. Should be cool!