CUPERTINO, Calif. (AP) — Apple has unveiled a long-rumored headset that will place its users between the virtual and real world, while also testing the technology trendsetter’s ability to popularize new-fangled devices after others failed to capture the public’s imagination. After years of speculation, Apple CEO Tim Cook on Monday hailed the arrival of the sleek goggles — dubbed “Vision Pro” — at the the company’s annual developers conference held on a park-like campus in Cupertino, California, that Apple’s late co-founder Steve Jobs helped design. The Vision Pro will sell for $3,500 when it comes out early next year, a price likely to limit its appeal.