Infra-red reflecting camp fire surround

Have you ever had a cold back sitting round a camp fire? It should be possible to reflect the radiated heat back in using a material that reflect IR radiation (such as foil). A windbreak coated with IR-reflecting material would serve this purpose whilst also serving as a windbreak. This device would allow a smaller campfire to keep the same number of people warm, reducing the environmental impact.

AR and the ideal home-working set up

I would like AR glasses with high resolution and a wide field of view. I can imagine a home-working setup where I can sit in an armchair (or perhaps in bed) with a keyboard/mouse on my lap and the equivalent screen real-estate of two (or more) 4k monitors in front of my eyes.

(I am doubting whether gesture recognition will be more efficient for data input than keyboard/mouse, which to me seems the most efficient user control interface yet devised.)