I'm all for keyboard-centric navigation, but what makes this better than Holmes? It does the same thing, but lets you search all of your already existing bookmarks, and there's no premium version/limitations.
Just had a chance to check out Holmes, you're right in that right now the offerings are almost the same. I hope as I iterate a couple of times I'll have more features that would differentiate further. I would argue that my search is more complete than their 10 bookmark limit and shortlinks isn't based off of fuzzy finding (which is I guess a negative for some people).