Also to a more trivial extent, perhaps the same idea behind the IR ports on Gameboy Colors. Which is a really interesting and probably underutilized feature to

Also to a more trivial extent, perhaps the same idea behind the IR ports on Gameboy Colors. Which is a really interesting and probably underutilized feature to think back on now. And even more interesting in that this preceded the first mass consumer devices offering WiFi, which Wikipedia tells me only really took off with Apple’s iBooks in 1999.