Appbrowser has had the keyword search for some time now, maybe not everyone is aware of the existing feature?
I really like the "Keyword" and "Search" features they work as intended, no problem there. The issue as I see it is simple, folks will use different keywords to describe the same app so unless all the numerous possible variations are included as keywords in the info file some if not all applicable apps will never be detected.
eg: Lets say I'm looking for a text editor, I'm lazy so my first search will be "text" which yields many results, many email clients etc, not exactly what I am looking for so expanding on the search I'll type "editor" but still not all text editors are included, next we try "text editor" things are looking up! we have narrowed down the search, but an mp3 player? what.. Maybe I know of an editor but just can't remember the name, yet I still can't find it in the results.. I could choose Geany, unfortunately the most full featured editors still have failed to be found.
I'm not picking on a specific app here, knowing how to search is a valid argument. However much like a web site, if you want your site to be found provide as many keywords as possible which describes the product. I think most folks would give up before trying these keywords "Office" or "Processor" Which indeed would produce results not yet seen by either "text" or "editor", perhaps even the app I've been looking for.
My point is; currently a search will rarely yield 'all' applicable apps, some but definitely not all. Keywords can be added apparently anywhere in the info file since the whole file is read, However a keyword field might serve as a prompt to add keywords.?
Tag, keyword, sounds like a plan. Though Keyword is consistent with the search feature.