I think the dock is primarily just a heatsink and constant power supply, allowing the chip to run at a slightly higher power-and-heat envelope.
I think it's possible that Nintendo could come out with a Dock Plus which has an eGPU, but it would make sense to force Developers to discard such a notion until after the Switch is released and has a full library. Providing it at launch could enable lazy developers and set the groundworks for a Wii U-level disaster.
I think it's possible that Nintendo could come out with a Dock Plus which has an eGPU, but it would make sense to force Developers to discard such a notion until after the Switch is released and has a full library. Providing it at launch could enable lazy developers and set the groundworks for a Wii U-level disaster.