On two occasions, my wife received PDF monstrosities via her school. The first time, I was astounded at the size of a PDF we had to download. When we opened it, it contained a movie. I was dumbstruck.
The second time, I tried to open one with Foxit and was informed that I MUST use Acrobat, which I dutifully installed. This PDF was actually a browsable archive of OTHER PDFs.
We already have video files, and even streaming video. We already have zip files. I want to beg Adobe to stop the madness, but if they've already put an email server inside Reader, there is truly no hope.