Just an idea for you to consider: a button called something like "Desktop version" that shows up for the users who accessed the website from a mobile device (AFAIK, cart is already capable to detect this) and allows them to switch to the full (Desktop) view of the cart (and back) by pressing it on demand. It could come in handy for some mobile users with very large screens who prefer desktop version (while cart redirects them to the mobile). It was a concern for Gnel here:
http://forum.abantecart.com/index.php/topic,1859.0.html
Sound like a great idea. We need to research on implementation with bootstrap