Google’s autocomplete (aka autofill and autosuggest) feature makes me feel like I am a member of the Borg. Sure, it provides quicker results to the internet, but it makes me feel like everything I think (and then search) is cliche and been done before.
Back to the implications for the ordinary user. Is this autocomplete and future variants of it leading to us having hive mind of information and thought patterns? Probably not, but if I type something in Google and it isn’t autocompleted I do feel special.
On the lighter side, Google autocomplete does lead to sometimes baffling and funny results.