Chortle chortle. What a joke. Anyone who works in a professional environment knows that it would be a nightmare designing in the browser considering how fickle clients can be. The optimal solution which is already possible in Photoshop is to export the design for web with clickable buttons.
Also, after a couple of revisions to the site the code can become cumbersome even if you are a seasoned coder. It’s all about keeping the sites lean and this will defintely not benefit the end user.