Re: So what happens when 2 people in the same room want to use the internet?
This interface was common on 90s laptops
And very popular on the Palm Pilot, which for a short time was nearly ubiquitous among gadget fans in the US. I recall family get-togethers where groups of cousins would be cheerfully beaming contact details at one another.
I still have a Palm Pilot Titanium lying around somewhere (I may see if I can get it working for a little retrocomputing fun one of these days), and I believe I still have at least one working laptop with an IrDa interface.