I'm surprised this hasn't sparked more discussion already. I think it's easy to throw all of these "platforms" into the same basket (the way "ecommerce" was th

I'm surprised this hasn't sparked more discussion already. I think it's easy to throw all of these "platforms" into the same basket (the way "ecommerce" was the catch-all bucket for all web apps involving money in the roaring 90's). This post nicely summarizes the difference between something like Facebook (which essentially wraps a traditional web app) and an actual operating system/hardware platform.