This will make conferences hell - like prezi did
These features are probably good in the hands of serious presenters. As a scientist at conferences, there are too many people who present badly, and spend too much time designing overcrowded slides rather than considering 3 things:
1. What do I want the audience to learn?
2. What do I need to say so they can learn this?
3. What visual information will add to this?
When Prezi first introduced its non-linear presentations, suddenly a bunch of enthusiastic PhD students spent hours writing incomprehensible talks, where the field of view spirals around zooming in and out of a giant page, inducing motion sickness to the audience. The first one I saw got people somewhat engaged, I heard the audience guessing where it would next zoom, no one learned anything.
Bringing these features to powerpoint will bring the ability to write mind warping presentations to everyone who has never strayed from powerpoint. And you just know that everyone who still uses slide transitions will be all over this feature, like a tramp on hot chips.