Wire-framing isn't new. You have perhaps used Axure, Balsamiq, ...
They are fast, but not fast enough to be used in real-time. You can't have the users sit there and wait whilst you wire-frame the requirements and decisions. So in practice you couldn't use wire-framing as a single tool for communication, analysis and documentation.
VisualSpec with its magical speed will change the game and empower you with a modern approach to business analysis.