According to this ArsTechnica review of KitKat, the ability to call people not in one's contacts by actually dialing their phone number will be removed and one will have to call them by searching for them in Google instead.
How in the Sam Hill is that even going to work? Not everyone is listed! If that's the case, I can imagine many people will download third party dialing apps.
edit: Never mind. I reread the article and it turns out there is still a dialer, but it's hidden. Still a stupid move on Google's part.