And when would you really need to look up info so urgently that you'd settle for a bumpy video? I can't think of any. I do think multitasking is a feature many people do want, but I really think recording video at the same time you are looking up info *on the same device* is so impractical, it doesn't make a good example of how multitasking could be useful on a mobile device.
1. It was an example of why letting the camera keep running in the background can be useful.
2. think of long recording sessions you in no way want to pause not to lose a precious moment you can't anticipate (e.g., your son's scoring).