Accessibility is easier because items have clear locations and sizes without computing cascading rules. This also allows for easier navigation (left/right) in a

Accessibility is easier because items have clear locations and sizes without computing cascading rules. This also allows for easier navigation (left/right) in addition to traditional logical / tab-stop order. If done right it would be harder to screw-up. Current HTML is very easy to inadvertently hurt accessibility. In my tests it would be very difficult to create a 1Mb page. You would need 10,000 text/image/nodes of actual content (not tags or containers). This just doesn't happen. Presentation is strictly separated from code execution so first load is never blocked by code. Code can dynamically change the page but does so by directly changing the DOM using limited server side-commands. In other words it's truly a thin client browser. You can bloat up the server with as much code as you want but the client side stays lean.