In near future, after IE9 has been launched, every major browser has (sort of) CSS3/HTML5 support. To prevent IE7 & IE8 becoming the new "IE6" for the next half

In near future, after IE9 has been launched, every major browser has (sort of) CSS3/HTML5 support. To prevent IE7 & IE8 becoming the new "IE6" for the next half decade, it's important to let them die. As a web developer, prefer graceful degration over pixel perfection. Let everybody access the content, but require a modern browser for eye-candy. People will upgrade (even corporations!), if they were not given another option.