A few days ago it appeared that someone at Google leaked a couple screenshots of a new dialer for Android 4.4.3. Now, a user on the XDA forums has posted another screenshot purporting to show another view of the Dialer app. This new screenshot uses a tiled display of contacts using the contact picture for those with one or a colored block with first initial ala the Gmail app for those with no picture. Judging by the search bar at the top, this could be the contacts screen as opposed to something like the call log screen. It is also unclear whether this would be the only view of the contact list or just one option for users.
source: XDA forums