I recently upgraded to a Dell Inspiron 15 7000 which has an "Ultra High Definition" 4k built in display. This means that for many programs the UI is teeny tiny. I know this is a tough problem to solve as it requires changing the absolute size value of every element in the UI to a relative size value but I hope it can be taken into consideration for future revisions. These displays are only gaining in popularity. For the meantime, I use an external 1080 display.