More and more applications will be a platform to deliver presentations, which means more and more applications need to do the following things:
  1. Have a good full screen mode
  2. Respond to Logitech and Apple remote controls
  3. Support dual monitors including slide preview mode, where you can see the upcoming slide on your laptop screen (not on the screen the audience is watching)
Adobe Acrobat does not have preview mode, and does not respond to an Apple remote. Apple Preview only seems to have slide shows with automated page transitions. OK, Preview might not be intended for running presentations, but Adobe at least should build in features that make Acrobat a good alternative to PowerPoint and Keynote for presenting slides.

Tablet devices would be another category. It is easy now to hook up an iPad to an HD screen. Again, presenting slides should be thought of as a required application.