[ye]

Because security and privacy.

There's a very good reason why your email client doesn't display images by default.

Imagine every major email client allowed using HTML5/CSS3.

One day somebody discovers a bug that allows you to execute random code. Now all you need to deliver a trojan to millions of people is mass-email it.

[airencracken]

Nope apparently all that matters is shiny. The short nearsightedness of some of these comments is amazing.

Kudos to be reasonable.