Pixel power.

There used to be an old joke that by the time you were old enough to have accumulated enough money to buy a really good hi-fi set-up, your hearing had deteriorated to the point where you couldn't appreciate what you had paid for. I wonder if the same considerations apply to sight? I've been looking at these high definition televisions, which still cost a lot of money, albeit they are coming down, and frankly I am hard pushed to see the difference between them and ordinary sets. My eyesight is not what it was, and perhaps that's the answer, but certainly at the moment I can't see the point in paying the extra for what at best - for me - is a marginal improvement in picture quality.