As a person who uses the Internet daily, and as someone who reads through dozens of websites per day, I learned to appreciate tabbed browsing. I couldn't stand the tought of being without my tabs and I completely forgot about the "Open Link in New Window" option.
As a web developer, I'd like to see tabbed browsing as a browser standard – something every browser should have by default. I really like the thought of being able to open links in new tabs, instead of new windows. Tabs aren't so intrusive and they don't clutter your desktop – that's a big advantage. Sometimes you just need to open that link in another window (or, shall I say, tab), and you just know it'll get on someone's nerves. Now, I'm not trying to say the tabs are the Absolute Solution to this problem, but I believe they are more appropriate and less annoying.
And should I even mention how nice it would be if the Document Object Model would reflect this change… :)