Detect WiFi On Your Wrist

While more people are reading time from a mobile phone instead of a watch, now we've got a watch that can also double as a WiFi detector, available from ThinkGeek for $30.
You know, my Nokia N95 can do both these tasks just fine: tell time and tell me what wifi hotspots are available. Why in the world would I want this wristwatch again? I can't think of a reason, but maybe you can come up with one. Leave it in the comments.