You know the drill by now. HTC has been pushing through the Sense 6 update to the old HTC One on US carriers, and now Verizon has given it the all clear. That means Big Red's M7 is getting the OTA update with Sense 6 starting today.
This update comes with version number 4.10.605.3 and is still based on Android 4.4 KitKat. The UI will be changed and most of HTC's apps will be getting a makeover. Also somewhat unique to this version of the device, the OTA comes with fixes for ISIS payments, Vcards, and a power-on bug. You can see all of HTC's Sense 6 enhancements on its website as well.
The update should roll out to everyone in a few days, but Verizon hasn't specified if it can be pulled manually by checking for updates. It's probably worth a shot, but no promises.