There are a few problems with this:
- Unless you are pro designer, icons, pictures are hardly ever consistent in format/style
- Icons/small pictures add clutter to already busy presentation slides
- For the viewer in the back of the room, the small icons/pictures are actually hard to see
- Clipart looks so 1990..
Sometimes keeping it simple is the best solution: 3 boxes in 3 different colours with the words ENTERPRISE, SMB, CONSUMER will do fine. Throughout the presentation, use the same 3 colour to talk about your user segments.