Virtual Reality has blasted into the mainstream after spending decades relegated to the world of science fiction — and the uses for it range from sex to gaming to sports and beyond, which were on show this past week at a recent expo that wowed visitors.

Facebook’s F8 developers’ conference featured VR prominently this past week, as attendees got to take Oculus’ latest product, Crescent Bay, for a whirl, and checked out Samsung’s Gear VR. And get ready for new offerings from Sony, HTC, and other companies who are hoping to dive into the lucrative market before others get a stranglehold on it, according to a USA Today report.

Virtual reality offers the promise of letting people experience things they wouldn’t be able to in real life, an irresistible appeal that has been fantasized about ever since computers entered the mainstream. Although the technology has been around for decades, it hasn’t had the computational power and price point that would allow ordinary users to experience it.

VR has an amazing range of uses that the U.S. military is already taking advantage of. Then there’s the gaming industry and the adult film industry which are already salivating over the technology and are likely to be early adopters of it. A representative of one company said that by 2017, virtual reality will be “massive,” according to the report.

Video games and pornography both boast sales of $100 billion, and virtual reality is a potential brand new revenue stream. And then there’s sports. NextVR, a California company, has begun to live-broadcast hockey, basketball, and other sports using virtual reality via Samsung’s headset. With this technology, the next time you attend an event, you’ll be able to view the action from a wide range of locations, including the stands or even pit row at a NASCAR track.