Throughout Fallout 3 and Fallout NV, one of my favorite things to do was open world looting. "Regular" looting where you open a container and the list of items pops up is fine, its a mainstay, it saves memory and rendering and its just efficient as far as system space goes. But a really fun aspect of Fallout 3 especially was where there was hidden loot in the actual world, where you would see a wooden box on a shelf and it was filled with empty nuka cola bottles, turpentine, wrenches, or some other ho hum to useless item, but if you grabbed the box and tipped it over, in the bottom would be chems or a pack of cigarettes or a stimpack, something extra that is more valuable that took a moment of extra time to find.
It was fun looking through hidden compartments, boxes, buckets, even a broken back of a toilet and finding loot you would have missed if you just ran on by looking only for containers, you felt gratified for looking a little harder and even beyond that its fun in a roleplay sense that you actually have to LOOK and SCAVENGE your items instead of just opening every drawer and magic Christmas metal box you find (seriously though, fallout 3 the company making those metal boxes must have been loaded).
I'm wondering with the graphics and memory upgrades of current gen consoles and PC's if maybe that will return or even become more of the norm. Obviously the rendering and bug testing for item stability would be insane, but I would love for the entire game, to enter a room and see a container and instead of clicking on it and it bringing up a menu, it actually opened and I had to sift through the crap inside to find my ammo, find my chems and stimpacks and extra bottle caps, you know, like Real scavengers would have to.
Anyway that's just my 2 cents, I enjoy this kind of looting, and actually having to use my interact button/key for something other than carrying stuff into another room to steal. Would love to hear other's opinions on the matter.