GeorgW said:
If you don't interact with objects lying around, will they take up less save data?
I don't own Skyrim, so this is a shot in the dark.
But if it's like Oblivion and Morrowind, then yes.
"Objects lying around" in the open, is what I've been calling "Static objects".
They're objects that have been placed by the developers, and will be present in that location for every game. If you interact with them, the game will note their position/status has changed, and will note as such in your save file.
"Dynamic items", in contrast, are generated at random, and don't exist until certain conditions are met (if the game generates a group of bandits; all of their equipment and loot are considered dynamic items). Dynamic items will exist in your save file for as long as they exist in the game world. So if you sell/consume these, your save file size SHOULD decrease.
(Fiddling around with Oblivion and Morrowind .esms also shows that the status of some special items; mostly quest-specific items, are ALWAYS in your save file. These however, make up a tiny number of the items a player is likely to interact with in normal play.)
Only problem with PC is that from what I've heard, PS3 is capped at 2GB RAM, so it doesn't matter how good a PC you have, it will at maximum only outlast the 360 by a factor of 4. It'll last you a long time, but not infinitely. However, the benefit of playing a TES game on the PC is that any problem, even this, will be modded. Maybe someone will find a way to simply delete a whole bunch of objects lying around, just to get rid of them from the memory. Wouldn't that be a good emergency solution for the PS3?
It depends on how much of the Cell-system's RAM actually goes towards the game, and not video or other things.
I'm not familiar with the specific architectures of the PS3 or 360 (I own neither), but I can say that a PC with a decent discrete video card (which essentially acts as a second reservoir of RAM even against the regular 32-bit limitation) should have no significant problems with framerate due to save file size alone for a long time.
Deleting extraneous and unnecessary static objects would lower the potential burden for the PS3, but it's a temporary solution at best, since the player is inevitably going to accumulate a larger save file size through play.
Nevermind that this also hurts the immersion. For example, you can potentially save some grief by deleting most of the forks and spoons in the world, but the houses will look more bare.