Nintendo is one of the big three console manufacturers who have had success for many years with porting or virtualising older games onto their new consoles, usually without much hassle. If you were a Wii U owner, you had the benefit of being able to use peripherals all the way from the GameCube era, and you had titles sold in the Virtual Console market going back as far as the SNES. With the Nintendo Switch, much of that backwards compatibility is lost, and Nintendo will have to go through another round of updates making the games run on low-powered ARM processors. Recently, however, the company started to trial Wii games running through streaming services, and you have to own a NVIDIA Shield TV in China to access it. That might solve the power problem.