When space is at a all time crunch with over population, and you only have room for the most immediate things in living spaces, you hand your guest a pair of bino's and they can look and enjoy your work. Of course this is after we realized we can't use LCD screens since the aliens have sensitive skin to such UV rays....You come up with your own reasning, but its just super cool. Like a painting on a pinhead or a grain of rize....etc