My friend is using a Dell XPS 13 2016 4K running Ubuntu 16.04 and have no big issue. Beware that while Ubuntu (Unity) itself support scaling and works fine with

My friend is using a Dell XPS 13 2016 4K running Ubuntu 16.04 and have no big issue. Beware that while Ubuntu (Unity) itself support scaling and works fine with 4K, many applications (especially, the old ones) are unusable with HiDPI.