This map show Hungary getting a small piece of the pie. Other maps I've seen show Poland taking a slice.
I really don’t think it is that simple.
Those maps are partially wrong, because there is NOT a linear line you can draw that says people to the West are ethnically Ukrainians and people to the East are ethnically Russian. It is a very gradual transformation the farther Northwest one goes.
And many Ukrainians actually speak Russian primarily, but still consider themselves Ukranian. And even vice versa.
That’s similar to what the US might look like in 2050.
The purple protuberance in the bottom center even looks like Florida.