I don't see pixels, but it probably doesn't mean you won't see it. It is a very nice screen, however, there might be bleedings - less or more depending on your luck. My girlfriend has a Macbook Air 11 inches and the Dell screen is another league. It is matte too, so it has different characteristics compared to the Macbook pro, and what is better depends on your taste, but I like matte screens better.
About DPI I would love to have the MBP screen, so I can do the 2x DPI mode, however, ~1.5x scaling for 1920x1080 is not bad at all. KDE scales odd DPIs really well, so I don't have a problem with it generally speaking. After you set the DPI on Control Panel/System settings, everything scales seamlessly. I have yet to find something that makes me frustrated in terms of app scaling.
About DPI I would love to have the MBP screen, so I can do the 2x DPI mode, however, ~1.5x scaling for 1920x1080 is not bad at all. KDE scales odd DPIs really well, so I don't have a problem with it generally speaking. After you set the DPI on Control Panel/System settings, everything scales seamlessly. I have yet to find something that makes me frustrated in terms of app scaling.