This is a weird thing that I think no one has ever done before, like I might be the first person ever to do this.
I bought a Switch mainly because of Breath of the Wild. Weird concept huh?
For real though, I don't think I have ever bought a console just for one game. I usually will buy a console with one game in mind but will only purchase it because of future releases or wait until more games come out. I wanted a PS4 for Bloodbourne but didn't buy it until games like Spiderman and Shadow of the Colossus were announced and Horzion Zero Dawn, Nier, Persona 5, and Lost Legacy were released. I wanted a 3ds for OoT 3d, but waited til Smash, X/Y, and Awakening were released. I wanted a Switch for Zelda but waited for Splatoon 2, Xenoblade 2, Mario, an FE Warriors came out. I wanted to buy a switch on launch or close to launch but I wanted to make sure it would last and be great past 2017, which it looks promising with Pokemon, Metroid Prime 4, and Kirby announced for the future.