I agreed 100%. I'm assuming that it will come next year (or whenever) when/if they have multi-user support in iOS. Scan your finger, get logged in as your user.
I don't think that they'll add multiuser support because then the incentive for e.g. each family member getting their own idevice would be less. instead people might get a family ipad...
The benefit from having multiple iPads is that multiple people can use theirs at once. Multi-user doesn't help that fact, you end up with a family iPad that's just shared without separate user accounts.
