 Apple's new Vision Pro pre-orders start Friday, January 19th at 8 a.m. You'll need to use an iPhone or an iPad with FaceTime in order to determine the right size of light seal and headbands based on the size of your noggin. If you're not sure about spending $3,500 on a product you've never seen and you'd like to try it out first, Apple said in a promotional email that it will open signups for in-person demonstrations at Apple stores starting at 8 a.m. Friday, February 2nd, and through the weekend on a first-come, first-served basis. Now, there's still a lot of details that did not make clear, like whether signing up secures you a specific demo time where you just get assigned, how long the demo will go, how much time do you have to set aside, and whether you need to stand in a wrap-around-the-block queue like Apple days of yore with the iPhone or if this is a reservation like a Genius Bar thing where you show up and you should go right in.