I’d also find this really helpful 
I’ve been trying to make my mind up about the common question of IDs vs titles as filenames. I currently use the naming convention YYYY-MM-DD-HHMM-hyphenated-title.md and am considering removing the text portion of this to avoid having to change the filename each time I want to change the title of the note. If link auto-complete worked by typing a title as an alternative to filename, this would allow me to connect concepts much more easily.
Having said that, because Obsidian makes it really easy to change links when renaming files, I’ve been trying out using descriptive filenames, which has made the writing experience much smoother because I can just link any [[concept]] as I go, and auto-complete makes this pretty seamless. (This post seems to describe a similar experience.) The problem I keep coming across is that I prefer not to have spaces in filenames (which makes scripting easier) but if I use [[hyphenated-links]], the unlinked mentions feature won’t work
I think this is probably a separate issue (any thoughts welcome), but being able to search by H1 or title for link autocomplete would get me close to this kind of workflow.
I currently use my notes across mac, windows, iOS and Android
so would rather avoid using Obsidian-specific or less widely accepted formatting like the [[this-is-a-link|pipe]] for link display. I’ve considered moving to standard markdown links but they don’t really serve the same function when it comes to this kind of workflow and they tend to break my train of thought and having to switch to the preview pane to click them is annoying.
(First post, so do let me know if this is a helpful contribution or better taken elsewhere.)
Gordon Bullard & Company