It's nothing magical. People don't value stuff you can steal at home anymore. The 4K TV is worth less than a nice CRT or flat screen was then. Computers and phones don't hold value long and they're often with you. Face to face crime is more common in the US, like burglaries involving people still inside.
I think in the UK the most common burglary target is car keys. Like you say, the expensive home electronics are now cheap, VCRs and hi-fis are gone, and more and more people are driving premium (BMW/Mercedes/Audi) cars - on finance/hp of course.
That seems very high, but not surprising. I would guess my car cost around 28K new but I bought it one year old for 20K. Most people don't buy new cars though do they? It's mainly lease and hire companies that buy new cars I think. Out of the amount of people buying new cars I would guess a lot are tesla or other high prestige models which would cost way more than this figure?