I think the best part is how short and elegant it is.

I assume a lot of people won’t realize you can bookmark that URL since it looks so weird. Also, once you’re bookmarking, you can cheat and put more logic into the page. I made a slightly improved one with a dark background and larger font (hard to post the link on HN, so on a separate page):

http://mrcoles.com/one-line-browser-notepad-bookmark/