Having grown up programming the old computers of the 80s and playing many games on them, I created this ZX Spectrum live wallpaper app for Android mobiles that you might be interested in.
It basically continually shows loading screens of Speccy games as they would appear on a real machine. You can choose the games you want to see or you can turn existing images or camera shots into loading screens (complete with colour clash)! There is even a mode to show the live camera image as if it was shown on a Spectrum.
Anyway, if you are interested the link is here...https://play.google.com/store/apps/details?id=com.adkam.SpeccyPaper
I was thinking of creating similar apps for other 8 bit machines but the Spectrum definitely had a destinctive way of loading in images and I'm not sure others would be as good.
I am also looking at ways to improve the app, so if anybody has any ideas I would gratefully receive them. Comments or criticism also accepted!