But. Big but. The small print on Apple's Watch site
"Features are subject to change and may not be available in all regions or all languages. Requires iPhone 5 or later."
Apple really need to start telling FruityFone dealers about this. Most mobile companies in the UK and most VAR resellers are still retailing iPhone 4S units. That is going to be a heck of a lot of pissed off teenagers who are getting a Apple Watch and their parents' handmedown iPhone 4s for their next birthday ... not this year obviously.