Looking for word describing Brave New World's consumerism practices and the reinventing of pre-existing products

Solution 1:

I believe the "word" used in Brave New World is Fordism.

The World State is built upon the principles of Henry Ford's assembly line: mass production, homogeneity, predictability, and consumption of disposable consumer goods. While the World State lacks any supernatural-based religions, Ford himself is revered as the creator of their society but not as a deity, and characters celebrate Ford Day and swear oaths by his name (e.g., "By Ford!").
_Wikipedia

However, my initial thought was that you were referring to planned obsolesence.

In economics and industrial design, planned obsolescence (also called built-in obsolescence or premature obsolescence) is a policy of planning or designing a product with an artificially limited useful life, so that it becomes obsolete (i.e., unfashionable, or no longer functional) after a certain period of time. ... It is the deliberate shortening of a lifespan of a product to force consumers to purchase replacements.
_Wikipedia