@Dave I have 2k notes and 100 tags and I already feel the difference between scrolling down, finding a tag and clicking it, and clicking it straight from a note. It takes 9 seconds to scroll down to the last tag on the list already.
I appreciate we all have different wants and wishes from the application. As I've said, from my perspective it is not good design because you are clicking on a note specific tag and kicking off global functionality that can already be achieved in a couple of ways already. Better that such an action relates to the note itself rather than pass control back to the global scope. But hey, my views are no more important than the next person, and it would be Laurent who would make any such decisions.
The way I think about tags is that they are connective tissue between the notes. So in my mind clicking on a tag anywhere should show you all of the notes with that tag. That is the way that WordPress cms works for pages that display the tags the page has. It's a way to connect with all the other posts that have that tag.
But this is just the way I see it. Looks like clicking on a note's tag now does nothing so I don't see how it could hurt.
+1! I agree that this would be a great feature and I've found myself missing it several times now. Not necessarily because it makes sense within the logic of the application, but simply because people are used to it - every other software I can think of that uses tags makes them clickable, and when you click on them it shows you all other items (be it notes, blog posts or something else) sharing that tag.