Depending on what silicon they go with, it could be difficult on the GPU side. We haven't heard much from Tegra chips on a while, but the Switch Tegra uses a GPU based on Maxwell Nvidia architecture 9xx GPU generation). Nvidia architecture generations are not intercompatible. Either they go with a much larger Maxwell GPU, or maybe they go with an architecture more modern (like Ampere). If they go the more modern direction, some sort of driver level translation will be necessary for existing Switch games.
