There is the máster system would slowly grow a base buy without how explosive were first gen nintendo games( specially super Mario bros) i would go slowly, with their most advance games( zillion, golden axe, phantasy star,etc)
Atari... i know little to nothing but Under tramiel they Will look a way to fail massively
Regardless i would imagine gaming even more pc based till Sega come with a true killer app ( phantasy star or zillion)