On the other hand, powerpoint has good font size defaults. I haaaaate when people use one of those javascript presentation things (or, shudder, something home grown), because their fonts are ALWAYS[1] too small for me to read (I don't have great eyesight, even with glasses, I can't always read everything at a distance), while powerpoint is typically pretty readable (as long as you have no more than 5 points on a slide... after that, it gets too small)

[1] in my experience thus far