PlaysForSure and Silverlight are actually great examples of what I'm talking about- consumers have zero idea what they are. Developers are angry that MS dropped Silverlight because they spent a lot of time learning it and creating stuff with it, but beyond an initial install screen (which they've already forgotten about) consumers have no idea whether they are using HTML5, Flash or Silverlight. This is a good thing.
Consumers do not regard the MS Courier tablet as a flop. They have never heard of it.