In the near future, at least.
This option is something we designed for the Switch version specifically, together with Saber Interactive-the team which was closely cooperating with us on the Switch port.
According to players over at Nintendo Switch subreddit, The Witcher 3 on Switch, or should we say, Switcher, has received a brand new patch, which is now live in Korea and should be coming to the rest of the world soon. Perhaps they just wanted to stop people from expecting insanely unbelievable things, to be subsequently let down by a standard patch. Do note, however, that "mod-related bugs and blockers" could be carried along with your save and cause headaches, and if you've changed the file name of your save for some reason, the Switch's Cloud Save feature won't be able to find it.
"Among the features introduced by Update 3.6 is save file integration with Steam and GOG, allowing gamers to continue their PC adventure on the go, as well as HUD, menu and Gwent touch control support".
Added more text languages (in selected regions).
Fixed various visual and functional bugs.Various gameplay and crash fixes.
While there are certainly a few tradeoffs that have been made in order to make The Witcher 3 run on the Switch, it's hard not to be impressed.
Judging by the images, the graphics upgrade lets players tweak 10 graphics effects to their liking: including motion blur, blur, bloom, sharpening, depth of field, cutscene depth of field, light shafts, underwater effects and foliage visibility range. As seen in the screenshots comparison here, The Witcher 3 looks much sharper in the new version.