Among other things we've done to ourselves, we've got higher-resolution displays, and we have GUI apps that can scale to different resolutions seamlessly. We have support for high DPI displays. We have fonts with sub-pixel rendering for sharper, easier to read text. Speaking of font-rendering, we have Unicode and internationalization support, so that people who read and write Arabic, Chinese, Japanese and other languages that don't use the Latin alphabet can use their native language in file names, dialog boxes and in anywhere else they might want to. We have better support for screen readers for the blind. For people who aren't fully blind, but have vision problems, we have the ability to make text and UI features larger dynamically to support them. We have better multitasking support, including process isolation to keep a badly-behaved application from crashing the entire computer. We have better security at the OS level to prevent malicious applications to take over the whole machine.

That's a big part of what we've done to ourselves. And this makes computers better for a whole lot of people.