It's bound to happen, Nintendo will release a handheld only version of the Switch and sell it for a cheaper price than the hybrid version of the Switch; calling it the Switch Mini.
I think the "Switch Mini" will be something similar to the 2DS ($80) of the 3DS ($150) series, getting rid of the gimmick of the console and selling it for a cheaper price.
But the question is: When will Nintendo launch a "Nintendo Switch Mini"?