Nah, there is no value to Sega bringing back hardware that would do anything in the market, and physical unfortunately is fading from the market that will only sustain as some vinyl collector's market.
All I want to see comeback is Sega having the same creative mentality to make weird games like Jet Grind Radio/Space Channel 5, or pumping out great arcade-style games on hardware people already own.
I want another Skies of Arcadia as well, Valkyrie Chronicles putting some characters in just feels like a tease.