Yeah just like the title implies. It’ll be usefull for creating pseudo 3d effects and creating mode 7 styled games. 
There was GD HTML5 demo doing that, but you had to write some custom JS and it worked only in HTML5 platform, meaning you’re limited to HTML5-enabled extensions. Note that you can make exe file out of exported HTML5 game using tools like node-webkit but you’ll still be limited to what extensions are in HTML5 platform so e.g. you won’t have for example lighting (which is only for native games currently).