In that case we might hope for an accidental slip or a deliberate simplification for the audience but she certainly should know better than to call that thing a power meter.
That's the point. It's likely that at the time, she honestly didn't know the difference (or didn't understand the difference well enough to realize that it would be obvious to other people). She did a Ted Talk where she bragged about how she didn't know anything about engineering when she started uBeam.