Mobile devices like tablets make it even easier, although their flash limitations make the creation of digital content difficult. Some experts recommend creating slide shows on a pc, then using the mobile device to deliver them.
There are far more options than Powerpoint these days, although it may take some time to learn them. One of the easiest is Google Presentation (via Google Drive). For more dynamic presentations, you can use Prezi or Haiku Deck.
Compare two different style of digital presentation — the first with Prezi here
And the same content delivered more traditionally here