Comment How I would use it (Score 2, Interesting) 189
To me, tabs are a part of my reading workflow - somewhere between bookmarks and speed dial. Tab Candy, if implemented, would be somewhere between bookmarks and normal tabs: permanent storage, but for task-specific purposes.
The reason why I use piles of tabs (50+ per window if necessary) is that I prefer not to do mental task switching between searching for something and looking for a solution/an idea/reading.
So I will do a search on something, open new tabs until I am satisfied that I have opened all the promising links, then close the search and start reading the tabs I have open. I will first glance at the content, and will just close the tabs that don't look like they are worth reading. Then I just read, leave the best tabs open for reference and start doing whatever the search was for (coding, writing etc.).
I currently use different windows to keep separate tab groups for each different task (e.g. email, coding, search for best widget). Whatever I use a lot or whatever I think I should look at again soon gets added to Speed Dial (e.g. Slashdot, interesting articles), and less frequent stuff that I want to keep for reference goes to the bookmarks pile. The only problem is that closing a browser window means I either lose all the stuff I haven't read in that window or I have to bookmark them.
Tab Candy would seem perfect for temporarily storing a window (e.g. reference material for project X) for later without the hassle of bookmark management.
I know it's "just a different kind of bookmark management system" from some perspective, but so is Speed Dial - which I consider essential.