Here's an interesting idea - what if Pro = Stylus in Apple's mobile world? There's not much precedence for that, just the iPad Pro (and certainly not the Mac(Book) Pro). Still, artist Martin Hajek (known for beautiful 3D renders of Apple products based on leaked blueprints) imagined such a world. The iPhone Pro is shown off with an Apple Pencil. Since the Pencil is 8.9mm in diameter, it can't sheath into the phone Galaxy Note-style. Instead, it may be attached (at least tied) to cases for the Pro. Another feature associated with the iPad Pro is the Smart Connector, which allows...
Source: http://www.gsmarena.com/martin_hajek_concept_iphone_pro_with_pencil_smart_connector-news-18725.php
