It doesn't have to be headquartered there, nor a startup to be relevant to the tech scene. Its not like its a small office building or anything, its a giant, state of the art campus that employs thousands and they've already committed to expanding further.

Are we going to say Amazon isn't going to be hugely influential in the tech scene of wherever they choose their HQ2 to be, simply because they aren't a startup and are based in Seattle?