These are supposedly screenshots from the upcoming LG G3, showing a flat and bright user interface. Procured by Digital Trends, we also can see a new element they're calling LG's "concierge" that suggests things like an umbrella when rain is in the forecast. The images themselves were originally 2,560 x 1,440, which would seem to also confirm the QHD display rumored to be coming with the G3.
While we won't know for sure until we see something official, this feels like a good look for LG. Like you, we're waiting to have an official look at the G3 sometime this summer.