Nvidia’s change log for version 1.1 lists the following:

Improved Fi stability in certain scenarios Improved camera performance Nvidia ISM feature toggle Stability improvements to Shield Hub Gamestream Shadoway performance optimizations calization improvements Audio optimizations Misc. stability improvements

It’s worth noting that this update doesn’t seem to address some of the things that we dinged the Sheild Tablet for in our review, like its battery life, though stability improvements are always a good thing. The software update can be downloaded via the Settings menu on your device under Settings > About Shield > System updates.