LaHell wants to do presentations with his Android Samsung tablet. Leo says an iPad with an Apple TV will work best. He could get Apple's Keynote app on iPad which is the best presentation software out there for a tablet.
Since LaHell wants to connect the Android tablet to a projector though, those devices have a small HDMI port called MHL. He can then get an MHL to HDMI adapter which he can plug that into a projector's HDMI connection. Another option is to just run it in a browser. There's some great online options, such as Slid.es or Prezi.com.