Technology advances quickly. In 2010 nobody would have guessed a portable console able to play advanced console/PC games in 1080p, 30fps for $300 in less than a decade out.
A 4K capable Switch in a couple years is definitely possible. I think the Switch will have more iterations than the 3DS. A Switch Mini, Switch Pro, and then eventually a Switch 2 in 4 to 5 years. A powered dock that enhances the power of the Switch more than now is also possible.







