We've already shown that remote and non-present communication works, but the difference between delayed and instant communication is huge. It's not so much text vs. video but that text gives you the ability to think and write/rewrite, while audio or video forces you to be real-time. IM, text, email, letters, and comments have more in common with each other than the issues of presence or remoteness, as do telephony and video.<p>Text-based communication won't disappear. Video may replace audio-only, but they're intrinsically different and each has their advantages and purposes. The medium or means may change, but we'll always have a delayed and an instant method of communication.