The Sega Nomad wasn't the Switch in 1995. There are some concepts that are similar (being able to play on the TV) it was a previous generation system in its entirety. The Genesis had already been established and it's hardware old. Suggesting that this makes it like the Switch is like saying the PSOne with the LCD screen attachment was also the Switch in the early 2000's.
The Switch isn't a home console that was converted for portable play, nor is it a portable console that was converted to the big screen. The Switch is it's own system in it's entirety.