Here is an IGN article on the cost of consoles over time
http://www.ign.com/articles/2016/10/04/comparing-the-price-of-every-game-console-with-inflation
https://public.tableau.com/profile/ugleymatt#!/vizhome/ConsolePrices/2016Prices
I think we've had this discussion / argument before on about inflation for high tech items, and how it differs from say, a gallon of milk, that stays basically the same for decades.