There seems to be an acceptance that Apple nailed the form factor for a smart phone when it launched the original iPhone. I'm still unconvinced. I'd like a PMP

There seems to be an acceptance that Apple nailed the form factor for a smart phone when it launched the original iPhone. I'm still unconvinced. I'd like a PMP slightly larger than the iPhone and I want my actual phone to be a sim card in size. I want it in a wristwatch or my eye-glasses or my headphones (but not my shoe).