Google just launched a new Photo Sphere viewing widget that you can add to ANY website. Check out this example by +Colby Brown (https://goo.gl/BbEpS) and see instructions here: https://developers.google.com/panorama/web
There's little difference from what has been on https://www.gopano.com/ for years, With a GoPano Plus, you can shoot this types of photos and movies from any camera and share them via the web. In fact +Controlled Capture Systems has a USB system on sale at their website.
I found that the large photo sphere images become difficult to navigate around when on a mobile device that uses swiping with fingers. As you try to swipe down the page you can get a bit stuck when just the images moves.
For more information, check out this page.