Firmware is awesome. It allows the outdated technology of your DSLR to be updated with a simple memory card. Here’s a description from Canon about what the Firmware will do for your 7D:
Canon is giving the EOS 7D an exciting upgrade with new Firmware Version 2.0.X! With Firmware Version 2.0.X, the EOS 7D gains a multitude of feature enhancements for higher performance befitting the flagship APS-C EOS. These improvements include a higher maximum burst rate (130* for JPEG Large/Fine and 25* RAW images) for continuous shooting, definable maximum limit for ISO Auto, compatibility with the GPS Receiver GP-E2, and manual audio level adjustment. Additional upgrades also include faster scrolling of magnified images, quick control during playback, in-camera RAW image processing, JPEG image resizing and ratings, plus customization of file names and time zone settings.