Just have to rely on phones with crappy user interfaces. The same reason no other features on cell phones were used before the iPhone.
Plenty of cell phones had plenty of features before the iPhone and NOBODY used them because the UIs on the phones sucked so bad that it was impossible for anyone to actually use them...
So wait and see and you will be astonished how many UK people end up using face time as opposed to some 6 year old video chat on some horrible phone UI from the past.
Most cell phones had cameras before the iPhone, but almost nobody used them with any regularity.... Same will happen with Face Time. it is easy to use, you just hit a single button on the contract screen.
People making these comparisons and taking about how the rest of the world has this stuff and it is no big deal are dreaming... Wait and see...
I know exactly what you mean! Nokia's were the main phone that initially had video calling here in the UK.
I remember I'd just bought an N70, and wanted to organise going out to the cinema with a friend. I selected their number from the phone book and it popped up these two options, "Voice call," and "Video call."
I had to get the instruction manual out, check Google and all sorts, it was an absolute nightmare. I just couldn't figure out how to male a call. I promptly threw the phone in the Thames and vowed to only buy Apple from that point on.