A very interesting post from Megan McArdle about the disparity in years between the US and the UK as to when various appliances were wide spread. She has thoughts on why this might be, but what I found most interesting is the chart at the bottom.
For instance, color TV (or something called colour TV) was first introduced in the US in 1961. Within 6 years, half of US households had one and by 1971, that amount was 75%. Over in Britain, they got colour TV in 1970. It didn't hit the 50% mark until 1978 and didn't top 75% until 1983.
Click through to see the whole chart. Very interesting stuff.