What is the first generation of truly wearable computers?

Possible commercial wearable trajectory...

Wear Clock

Simple digital clock

Wear Pager

See who is paging you without looking down

Wear PDA

Access to all of your PDA functionality without having to stop, grab your PDA with both hands (one holding, one writing), and use both eyes to access the info you need...

Wear Phone

Make your phone accessible in an unobtrusive form

Wear Laptop

Access your laptop without having to lug it out of your bag

Wearable

Stage 1 - email, calendar, phone. Basic PDA and Cell Phone abilities
Stage 2 - Location awareness for appropriate interaction with applications
Stage 3 - Enhancements to input devices and improved optics (including wireless components)
Stage 4 - Face recognition and cataloguing
Stage 5 - Conversation Transcription
Stage 6 - Full Context-Aware Passive Intelligence Augmentation
Stage n-1 - Implants
Stage n - The Borg