Nintendo

You're actually skipping one of their handhelds: the Virtual Boy, Nintendo's attempt at a 3D console in 1995. It was such a huge flop that its designer, Gunpei Yokoi, delayed his retirement in order to help develop the Gameboy Pocket, which was meant to hold the company over until the Gameboy Color was ready for launch.

I get what about not jumping to a new thing just because, but that's kinda Nintendo's whole thing (well, that and abusive IP lawsuits). Sometimes it's a huge hit, like the Wii, and sometimes it's a train wreck, like the Wii U, but it's always different and, either way, it usually causes them to innovate.

That's what I like about Nintendo; unlike their competitors, they're not releasing the same product every few years with a graphical update, but that seems like what they're doing here. I'm used to seeing them keep the same system alive for a decade, like the Gameboy or DS, and I'm used to them coming to market late with a relatively underpowered system, but I'm not used to seeing them say, "That was successful, let's just make another one of those."