OMG. With the best will in the world, I can’t see this as an overall good thing. 
At it’s best, PowerPoint is a fair-to-middling tool, woefully often mis-used, and giving people more gadgets is going to result in more really, really bad presentations. That’s not to say there aren’t positive uses too, just that my experience I’d risk a bet that more often than not it all ends in tears…..
Oh, no… wait….. that’ll be more work for me as a presentations trainer! Ah, I take it back…. it’s a good thing! 
More seriously, if you’re tempted to get into this kind of gadget/gimmick add-ons to your PowerPoints, remember to ask yourself if you really, really need it. If not, it’s just a vanity on your part and a distraction on the audience’s.  Besides, you still need to have a really good recording voice to get things worth listening to…..
I’m still trying to think of a use for this…. maybe as a kiosk type presentation tool for children?
I’d agree entirely with you… when it comes to PowerPoint, less is definately more!
Regards,
David.