They can't sell the web as a working platform...
Because the web's not a working platform and won't be. If my company gave out Chromebooks instead of laptops, our business would come to a screeching halt, because our laptop users are actually conducting business on their laptops, not playing Angry Birds and blogging with Google Docs. How is a salesperson supposed to do a quote from their ERP system unless their ERP system has a web app on Google's market? And why would you prevent your team from doing any work whatsoever at any time they don't have an Internet connection? Such as on a plane travelling home from a sales call?