I agree... Most of which haven't appeared yet. Some of which haven't even been conceived yet.
When voice recognition and a standardized means of identification are common, I imagine that many devices will be built into the things we surround ourselves with everyday and not carried about as much as they are now.

***

HAL: You don't mind talking about it, do you, Dave?

Dave: No, not at all.

HAL: Well, certainly no one could have been unaware of the very strange stories floating around before we left. Rumors about something being dug up on the moon. I never gave these stories much credence. But particularly in view of some of the other things that have happened, I find them difficult to put out of my mind. For instance, the way all our preparations were kept under such tight security and the melodramatic touch of putting Drs. Hunter, Kimball, and Kaminsky aboard, already in hibernation after four months of separate training on their own.

Dave: You working up your crew psychology report?

HAL: Of course I am. Sorry about this. I know it's a bit silly.