Startup Idea: Real-Time Layout Preview Plugin for WordPress

Startup idea to develop a real-time 'What You See Is What You Get' layout preview software plugin for WordPress and Visual Composer. The tool should allow web designers to see changes they are making to a page in real-time, mimicking the user experience of software like Photoshop or Illustrator, without having to preview or update the live page.

I am a web designer for a small marketing firm. Over the past few years we have begun using WordPress for most of the sites we build and while it's definitely a great open source solution, there are lots of issues that could be solved by the integration of software.

My main need would be for a software plugin that allows for real time "What You See Is What You Get" page layouts when using Visual Composer. Right now, there is no way to instantly see in real-time what you are doing, while your re doing it. You have to either preview the page (which involves loading a new page each time a change is made) or you have to just update the page and make it live -- which can also be sort of an issue if the site is getting traffic.

What would be perfect is something that puts the layout of the draft page/changes you're making on the screen somewhere so you can see what you are doing as you do it, the same way pretty much every other software works, like Photoshop, Illustrator, etc. There is sort of a live page builder solution currently, but it doesn't work very well and involves using an entirely different interface. I'd like it to be visible on the regular Visual Composer layout page.