I travel back and forth between the UK and US and yes, in-general electronics do tend to be cheaper in the US. Take for example a Samsung laptop I bought last visit after dropping my Fujitsu going through TSA. I saved about £130 over buying the identical model here in the UK. Now even taking into account VAT etc, It would still have cost between £50 and £60 more to buy it here. However, its not just electronic. I'm also into custom cars and bought a set of headlight last year costing the equivalent of £89. Same ones here, £329.95 and they are made in Germany!
However, as others have pointed out, there are many things in the US which are way more expensive than the UK. So, don't think the grass is greener, its not, its about the same. LOL!