The music player iTunes is already very popular with his friend QuickTime. Now the Safari Web browser will appear for Windows. It's already possible to download the beta version .
That's a good news for web developers. Safari is a good web browser and is respectfull of the W³C consortium standards. Internet Explorer is catastrophic concerning this (all versions) and we can expect that the popularity of iTunes will drive the one of Safari. Moreover Safari looks nice, that's already a reason to use it.
Web developers can dream of a world where IE is not used to browse the web, thus no need to adapt the design to work also with Internet Explorer. If it's easy to abtain the same rendering with Safari, Firefox, and Opera, some aspects can quickly turn to headache with Internet Explorer, forcing to use a lot of javascript or others very tricky tricks.