Global Domains International

On Wordpress.com when you create a .wordpress domain, under theme customization they have a device preview option. It's here you can view as you customize the website, how it will look on different devices. Is there any plans to implement this feature? Or is there a plugin that is a good substitute, I don't want to have to go to another website or device just to see how my website will view under different circumstances. If there is an app I would appreciate a link to it, Thank You.