The Bionic was treated like the red headed step child by motorola and vzw over the years as it seemed like they wanted to forget all about it. If you still have a bionic and plan of keeping it then you too can get a taste of 4.3 thanks to CM 10.2. Of course you will have to be rooted and running a custom recovery but once that is done check out CM.
CyanogenMod 10.2 Nightlies Start Rolling Out, Based on Android 4.3 ? Droid Life