It is very hard to tell, but after carefully analysing and older photo of groom lake from the book Area 51: The Dreamland Cronicles I think
what you are looking at is more likely a much older runway being resurfaced. Good eye, but I really don't think that is new.
The image is pretty out of date. It is old enough that the south half of runway 14L/32R is still open and the new central taxiway is still under
construction. South Delta Taxiway has already been turned into a runway, but the lakebed runways still have the offset ends.
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