The device you see in the picture is not the LG G3 but the LG G2, last year's LG flagship and a device that remains on shelves in the U.S. The LG G2 won't be on shelves for long though as an LG G3 launch is expected later on this month.
Rumors suggest that the LG G3 will come with a number of upgrades including changes to the display, processor, camera, and design. All of these things should be enticing enough to convince potential HTC One M8 buyers to wait.
We haven't been hands on with it yet but at this point, given LG's success with the G2 and given that it's arriving in just a few days, we highly recommend waiting. Those looking to get educated ahead of launch should check out our LG G3 coverage for all of the details.