In addition to Android 4.4.2, (and unspecified security enhancements) the update adds cloud printing service and Bluetooth profiles ? both parts of KitKat we've seen on other handsets ? while killing support for Adobe Flash in the stock HTC web browser. The latter has been a long time coming ? Flash on Android hasn't been officially supported since mid-2012.
Besides that it's business as usual on HTC Sense 5.5, with one minor cosmetic change. The battery icon is now white-on-white, like stock KitKat, rather than colored as it was on Jelly Bean. (We've got pics after the break.)