Apple. I love Apple. And Apples.

whoops... I thought it meant if there was only 1 company that could make consoles, who would you want it to be

well atleast its not the double facepalm :)

Samsung, Apple, or Sega.

It'd be interesting to see what first party titles Apple, and especially Samsung (Korean company), come up with.

It'd be amazing to see Sega handle a revival. They'd be forced to revive many old series and to make Sonic games good. They could support a console with their first party lineup.

Bayonetta (Hack and slash)
Jet Set Radio (Action)
Panzer Dragoon (Rail Shooter)
Phantasy Star (RPG, MMO)
Puyo Puyo (Puzzle)
Shining (Strategy RPG)
Shenmue (Adventure)
Shinobi (Action-adventure, hack and slash)
Sonic Racing (Racing)
Sonic the Hedgehog (Platform)
Super Monkey Ball (Party)
Total War (Strategy)
Valkyria Chronicles (Tactical RPG)
Virtua Fighter (Fighting)
Yakuza (Open world, Action-adventure)

Probably Samsung or Apple.

Sega

EA. It would become a huge money pit and finally cause the company to collapse into a fantastic supernova. I know.. I'm still really bitter about those swimming pools.

Samsung

Ummmm when did Sony stop making consoles already?

Apple would blow them all out of the water. Sure, you'd pay a pretty penny but anyone who's owned a Macbook Pro will tell you just how sweet their hardware is in both build quality and stability. No one else even comes close.

But MY choice would be Sega of course. The Dreamcast 2 would be a hit imo because the original is now considered something of a legend.