I bought the xreal air one last year. Just looks like a pair of sunglasses, plugs into my MacBook Air via USB-C, and Projects three 1080 P monitors in my field of vision. I set my laptop up at a café, black out my macbook's screen, and it works pretty well. Been doing this almost every day for months.
They also have a device that let you cast to the glasses wirelessly so I can go for a walk and have a little YouTube video in the bottom right corner of my field of view (think of those old picture in picture TVs)