We usually call this a "greenfield site" as traditionally Intel has purchased large swaths of empty space to build a brand-new campus. The site where Ronler Acres (the name of the farm that used to exist before it was an Intel site) sits was just a huge empty farm field until the company turned it into what you see today. It's really nice to have all your suppliers already near your site and ready to serve the business, but a facility of the magnitude they're talking about here will cause those supporting facilities to also move into the area.
It's not just Intel that's moving into the new neighborhood. ASML, TEL, Hitachi, KLA, handfuls of gas and chemical vendors, and a whole raft of others are coming with them. A project like this has the ability to single-handedly revive an entire section of the country. Somewhere that jobs are desperately needed. Not just high-end technical jobs either. Something like this can employ hundreds of construction crews for decades. The local infrastructures all need upgraded - water supplies and sewer returns and roadways need widened and stoplights installed and new sidewalks poured. . . it goes on and on.