Yeah, I'd say Sony is the targaryen, who was unsat by the great usurper Robert Baratheon.
OR, Sony is Baratheon, who sat for a great long time, and Nintendo is lannister, who killed Sega the Targehryens, and now a Lannister is on the throne (the product of incest read: the Wii :D), BUT STANNIS IS COMING BITCH.
I guess that would make Microsoft the white walkers since they are always online.
Also, Tyrion is the gamecube
Even though Sega doesn't really match the Targaryens, I think what you have is probably the best example. But I would still say Microsoft is the Starks, there were rumors that Microsoft and Sony were teaming up to starve Nintendo from 3rd party support, so that's kinds like when Rob and Renly were teaming up, but Stannis(Vita) betrayed his brother, stole his men then attacked the Lannisters and failed(Vita/3ds competition), but Stannis is coming back with the ps4. And microsoft is kinda, not doing so well with these online rumors.
Close, but I think Renly is more aptly set as the Vita, and PS4 will kill it by making it a controller. Also renly never teamed up with Rob.
Anyway, who do we have left?
Wildlings Mance Rayder
Tyrells and Highgarden
I'd say Apple is the Tyrells because they are just lannisters of a different color (symbolizing the color strategy of apple and nintendo) and they are rich.