1- Sega went for a "clone" rather than emulation (even accepts Genesis cartridges)
2- Nintendo's IP in the classic gaming space is unmatched
[1] http://www.gamestop.com/genesis/consoles/sega-genesis-classi...
1- Sega went for a "clone" rather than emulation (even accepts Genesis cartridges)
2- Nintendo's IP in the classic gaming space is unmatched
[1] http://www.gamestop.com/genesis/consoles/sega-genesis-classi...
The older TV Plug and Play ones, however, had a Genesis-on-an-ASIC, a native licensed silicon clone of the original chipset. These were super accurate, and could even have a cartridge slot wired to them by the enterprising modder. They ran at 3.3v, though, so things get quirky with a real cartridge without proper transcieving logic.
The genesis one is pretty bad quality and while it has some good games built in there's lots of not very good one off third party games the creator built in for increased gamecount.