One of the tasks of students (and teachers) in the near future will be to keep track of the virtual teachers who may provide them the best outside help. It would be great to have a site similar to Netflix for learning, with suggestions and recommendations based on your "favorite" virtual teachers. Along with teachers, there can also be online games or virtual worlds that work best for each student in creating learning.
The blended learning model seems a great way to combine the flipped and traditional approach. In some cases, students get the introduction to a topic before the first class activity. A few topics may even take a Hollywood-type movie trailer to peak interest. But that's okay because there are many creative teachers and students out there to create them. In other cases, the videos and games are used for reinforcement or further reference. ("Tonight for homework, work towards your 'Cell membrane badge' on Club Penguin so you can trick out your igloo with another big screen TV"). Eventually, some games may even be creative enough to help create deeper learning. ("There are still six gold coins to be found in the ancient Egyptian ruins in Club History so further investigate this evening. Winner gets to pick the next century we visit").
It is a very exciting time to be in education. While a tool such as Khan Academy is not the be all end all in learning and teaching, as with any tool, it becomes useful in the way you or your students use it. Whether that be flipped, double flipped, blended, or other (why do I have a craving for Starbucks?), it's great for students to have so many choices.