A tv that cost $1000 ten years ago costs about $300 now. A computer which costs $3000 ten years ago costs about $300 now. Your example is not that definitive.
Your examples provide evidence that increasing efficiency and scale can lower the cost of production, and the results are shown in the market place.
You have failed to show what these items would of sold for in un-inflated dollars.
It does not promote savings when a quarter drops to a couple of cents, in 25 years or so. Inflation promotes borrowing, with the intention of paying back the loan with inflated, or less valuable money.