Sales 2.0 is about web conferencing. Sales 4.0 goes with augmented reality.
Visualize and present your product with AR glasses. Customers simply connect to their AR glasses via tablet or smartphone and see the product in AR in front of them.
Provide “interactive AR helpers” during the presentation e.g. documents, manuals, videos… etc.
Or present your product in live operation. The customer simply connects to your glasses, and so sees what you see.