i think the usefulness of sherlock went away with the simplicity of dashboard.
Well, Sherlock may have been replaced with the "simplicity" of Dashboard, but widgets haven't replaced the usefulness of Sherlock.
For example, it takes two widgets AND Safari to even begin to duplicate Sherlock's Yellow Pages channel (now dead as a doornail), and even two widgets and a web browser don't do the job as well.
Count me as one who will miss Sherlock, and I think it's a shame Apple let it die on the vine. Nothing wrong with widgets, mind you, but the concept of aggregating content from multiple sources on the web (or otherwise) and being able to present all of it in a single window with a specific purpose in mind was - still is - a great idea. It just seems like there is plenty of potential for taking that concept to the next level.
Attempts at some of Sherlock's previous functionality are present in Dashboard, but it's almost always crippled compared to what Sherlock was capable of. Widgets are great for simple, one-shot functions, but anything greater than that and it's not a widget anymore.
Apple's forthcoming movie widget is probably the closest thing yet to duplicating one of Sherlock's channels and, at best, it's just the movie channel repackaged as a widget. It's not an improvment, or an evolution, or some new whizbang functionality. It's the same old thing Sherlock had years ago.
And it's not even here yet.