Like I've been saying, the closest we would get to a SEGA console now is a console from another company that allowed developers more of an identity in the digital marketplace. To be honest I'd LOVE it if XBOX 720, PS4 or Valve's rumored console has channels for developers to have all their titles in one place. There would still be an all encompassing marketplace, like PSN or XBLA, but there could be Apps like "SEGA Channel" or "Capcom Channel" or "EA Channel". Opening those apps, or even built-in sub menus within the marketplace that could be pinned to the console's home screen, would show a library of games you own, a library of games for sale, sales and promotions, a video channel (perhaps a direct feed of the company's youtube channel?) a news board from the company and other stuff that the company would have control over like the background and music elements. Like a cross between a company Facebook page and an online marketplace, but with much more polish and identity.
Sure you're still playing on another company's console, but everything on screen is controlled by SEGA. I think that would be awesome.