There is no 'home version'; there's a copy that you can buy for Switch and copies you can buy for other systems. As you mentioned, The Witcher 3 is a 4 year old game, so the people who'll likely buy it on Switch won't own another system and had the time to play through it all at home. So whatever it costs on other systems doesn't mean anything.
I own a PS4 - but not Witcher 3. If I'm getting a high quality, 100 hr+ game either way - the cost doesn't matter so much to me.
I'm interested in the Switch version as I get more gaming time on Switch than on PS4.
If Witcher 3 is a port like WWE2K18 or Ark, I'm not gonna bother with it. I'm counting on something substantially better than that though.
I predict NX launches in 2017 - not 2016