The iPhone’s retail debut was on June 29, 2007 — four years ago today. Its large touch screen isn’t novel anymore, but was revolutionary then. For example, here are three smartphones what were white-hot in 2007:

The HTC Tilt 8925 / TyTN

The Treo 755p

The BlackBerry Curve

Today they look archaic. Especially the HTC Tilt. Goodness, what a beast.