I really, really, REALLY hope that Unity fixes their editor UI in version 5 (I haven't tried the beta yet, so maybe it's the case already), but as it stands right now I can't use Unity for long stretches (visual impairment). The font rendering in the editor is terrible, even at 1920x1200 the text is too small (froget about Retina even). This has been a problem with Unity for YEARS, which is a shame because it's a great tool otherwise.
I'm still torn between the two tools, they're both fantastic for different reasons, but if Unity 5 can't fix their editor then I think I'll have to jump ship just out of necessity.
It amazes me how this has seemingly been such a low priority item for the Unity Editor team for so long. This is a tool that people are expected to live in for an extended amount of time. This problem needs more widespread recognition than it's getting.
That's a valid point, but I wonder how many people just don't complain but would be more productive if this were addressed?
The absence of a fix is frustrating but not in and of itself - I know what it's like to have an old codebase and the massive job that it can be to retro-fit a feature like that. I just wish that Unity had given some proper statement on it over the last few years. The editor is the face of their product - you're expected to spend a great deal of time in the tool. This _has_ been a frequent complaint (just Google 'increase Unity editor font size' for example).
I just wish there had been one statement as in "we know it's an issue, this is what we're going to do to fix it / this is why we want to fix it but can't right now". It's an issue that plenty of people seem to be having - I mean, anyone who owns a high-DPI display is going to run into it and there are many threads on the forum about that kind of thing.
I'm glad at least to see that they've started working on it. I hope it makes it into the 5.x cycle.