Microsoft is updating Paint app soon
As you can see in this video, Microsoft is making paint as a UWP app although it is not confirmed using the bridge that converts win32 apps into a modern app.
The new interface looks more touch friendly. New features have also been introduced with keeping all of the traditional features.
There is no ETA when the app would be released, but looks like that it would be the part of next major update called Redstone 2 to be released next year.