As a refresher, the Action Cam LTE is meant for rugged exploration, with IP67 water-proofing (as well as dust and sand) that means you can leave it under water up to one meter for 30 minutes and still use it afterward. With a Snapdragon 650 processor, 2GB RAM, 4GB of storage, and a 1/2.3-inch 123 MP wide angle camera, it should be as powerful as it is good for taking on the go.
The key feature is its connectivity. If you're the type to share the video you capture while out doing water stunts or rock climbing or something equally physical, the camera supports LTE and 3G so you can stream using YouTube Live or other streaming services. This way you can skip the whole uploading step and broadcast live, whatever it is that you're doing. Not a lot's changed since we last saw it, though it does appear that LG has finally made a proper case for it. Last time we saw it, it seemed to be jammed into a GoPro mount!
Update: LG tells us what we initially thought might be a lens cap is actually the rear end of the product where you insert the Micro SD Card and a Nano SIM, so you'll still need to keep that lens brush handy.