Philips bills the device as a "camera key ring" and "wearable digital camera". They have a similarly designed audio player billed as an "audio key ring" and "wearable digital audio". A note on that product page says, "Let's face it. It's all about size and it's how you wear it."
How do you "wear" a key ring? My keys get tossed into my purse or backpack and sometimes go into my pants pocket. So if things that I can put into my pocket qualify as "wearable", then we should add the following items to this category: pens, highlighters, post-it notes, tampons, credit cards, coins, matches, gum, receipts, lipstick... I could go on.
Ok, the devices each come with a necklace strap so that you can wear them around your neck, but come on, people have been wearing cameras on straps around their necks for decades. Granted, the size of the new Philips camera makes this a little easier, but I think describing it as "ready to wear" is pushing the matter.
Wearable devices need to be designed with consideration for the human body, both at rest and in motion. Small does not equal wearable.
- Thanks for the link, Kenneth!