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actually that doesn't show the whole picture.
if the cost of the item in question...
like computers and other high tech items.
gets cheaper, quicker, than the value of the dollar declines.
then their price goes down regardless

Computers...for example.

The linked article says it's because of stock market appreciation, and "Yet just 10 percent of the U.S. population owns 80 percent of stock market wealth. ". That's probably why majority of American don't feel getting richer.