IDG: Oculus Rift hasn’t gone on sale yet, but Facebook CEO Mark Zuckerberg is already imagining what future iterations of the virtual reality headset could look like. During a Facebook town hall, Zuckerberg theorized the Rift will lose its visor-like appearance and eventually resemble a pair of glasses. Facebook purchased Oculus, the company developing Rift, for $2 billion last year. Eventually, the headset won’t need to be tethered to a computer to work, so people can move around freely while wearing it, Zuckerberg said.