Kinda different, kind of the same but i'd love to use an app with much better search than the 'direct search' currently in most aggrogrator/ note apps. If i searched 'quotes' it would rip out and return all the things in italized, in quotes, or things that the algorithm deems as quotes based on it's scrape of the internet; Kinda like google but 'personal search' based on my notes, articles, all my different emails (work, and my 37 different gmail accounts) and websites I frequent (like reddit, hacker news comments, etc.) There was an HN article the other day that got me thinking about this problem, but i can't seem to find it. However, it approached it from a much deeper technical level, utilizing emacs and searching through his code. If you could bring that into an easy to use, consumer facing GUI I think it'd have potential to be pretty game changing.
'Personalized Search, and we don't have to steal your data because you willingly give it to us' - Google