But still 16GBs is 2.6x the size of the largest game released to date. That's way way too big of a leap, even for a "next-gen" game.
Are you sure the largest game released to date is 6GB? What about this one? http://www.amazon.co.uk/Medieval-II-Total-War-PC/dp/B000ENN9AG That's 8GB minimum, pre-expansion packs.
Expansion packs don't count. Let's say the biggest game out now is 9, or hell, even 10GBs.. it still makes 16GBs way too large for a game now-a-days, and that was just the minimum requirements. Besides, games' minimum requirements size are usually 1-2GBs more than what the game's size actually is, in case of updates and such.
well, new tech, new disk space requirements I suppose. In this day and age, 16GB isn't huge. some HD films are that big.