5 minute "battery backup" on notebooks to allow fast main battery switching
I would like to see Dell notebook computers incorporate a small internal battery that would allow users to quickly swap out their depleted primary battery with a fresh one - without having to power off or hibernate the notebook first. Hibernation sometimes fails on resume (although far less often than Standby), and shutdown/reboot takes too long when you're in the middle of an important meeting. I've been told that Apple MacBooks allow you to swap out batteries without shutting down first.
Another alternative would be to have hot-swappable module device bays that would allow placing a secondary battery in the bay (in place of the optical drive). This is done on the IBM/Lenovo ThinkPad line of notebooks. If the notebook could run off the secondary battery while the primary battery was being swapped, that would be fine, too.