- improved browser stability through multiple processes
- faster through better memory control
- more sophisticated use of JavaScript (virtual machine, better garbage collection)
- better security from malware and phishing using sandboxing
- clean, efficient UI (streamlined search features)
- open source
In a matter of days I've gone from using one browser (Firefox) to four (Firefox, Chrome, Opera and Safari)
Firefox - best for Add-ons
Chrome - best promotion
Opera - best for SVG and probably CSS
Safari - best for The Lively Kernel