In the consumer electronics world, a direct £1/$1 exchange rate has been operational for as long as I can remember. It is unaffected by the exchange rates prevalent elsewhere in the real world.
Of course, higher taxation, from VAT to the other costs of doing business in this country, doesn't help, while the greater economies of scale in retailing in the USA have an advantageous effect on pricing there.
And bear in mind that US prices are often quoted net of any sales tax, which varies from state to state, and can also vary between cities in the same state. This can add up to 10% or so to the price, whereas of course UK prices include the dreaded 20% wedge for the Chancellor.
But yes, prices are lower in the States, and those for consumer electronics have remained so despite the huge effect the strength of the Japanese yen should have had on prices there - the dollar has softened by about 30% against the yen in very recent times, but such is the state of the market in the USA that prices haven't risen. If anything, they've kept on falling, and that's creating real profitablity problems for the manufacturers back in Japan.
Mind you, in the UK the value of the pound has fallen by some 40% against the yen in the past decade, and yet consumer electronics products imported from Japanese companies aren't just less expensive now than then in real terms, but in actual terms, too.
If it's any comfort, even UK-made goods are less expensive in the States than they are here: to take an example (and it's just one I found easily to hand), a Jaguar XF V8 - the base model in the States - is around $50,000 on the road there, and £50,000 here.The Jaguar XF is, of course, built at the company's Castle Bromwich factory near Birmingham.
A direct currency conversion - though for the reasons given above it doesn't tell the whole story – makes that US price around £32,000, and taking into account the Economist Big Mac Index, and its implied purchasing power parity, that falls to just under £30k.