Displaying pyqtgraph and pyqt widgets on web
Here is what I have sort of put together by pulling several threads online:

Ruby On Rails seems to be more popular than python at this moment.
If you go python, Flask and Django are good templates.
bokeh seems to be a good way of plotting to a browser. 
AFAIK, there is no way to take an existing PyQt or pyqtgraph application and have it run on the web.
I am not sure how Twisted (Tornado, Node.js and Friends) fits in to the web SaaS, but I see it referred to occasionally since it is asynchronous event-driven.
People often suggest using Rest, but that seems slow to me. Not sure why...
Is there a way to take existing python pyqtgraph and pyqt application and have it display on a web page to implement software as a service? I suspect that there has to be a supporting web framework like Django in between, but I am not sure how this is done.
Any hints links examples welcome.