I don't play F:NV without hardcoe mode, requiring me to eat, drink and sleep and I still disagree with being forced to walk. As someone who also (almost) never uses fast travel, it can quickly become time consuming. It takes too long to get places with nothing happening in between. That's not fun. Nor is it a challenge. It's just time wasted trying to get from point A to point B. And my impression so far of Skyrim is that point A to point B with almost never be a straight line, making things take even longer.
Either I'm not explaining things very well today, or you're just being totally unwilling to give any credence to any of my points . . . but I'll give this one more try. So please pay attention this time, instead of just disregarding the parts you don't like.
1.) In Fallout 3 and Fallout NV (even if you are not using the hardcoe mode) eating food and drinking water restores HPs. And sleeping (in the non-hardcoe mode) for just 1 hour totally restores ALL your HPs and heals any crippled limbs. I found this all to be totally unrealistic (and the hard-core mode wasn't much better). Yet, most of the very same people here who claim that eating, drinking, and sleeping is too tedious, and "ruins" the game for them (and who also played FO3 or FONV) . . . have absolutely no problem doing all these exact same things to heal their character. This is why I feel that the problem is not that this makes the game "too tedious" . . . it is because adding the need to eat, drink, and sleep to survive (in the way that most of the realism-players want this) also makes the game more difficult, since the mods that do this generally remove the unrealistic healing parts, and add penalties on your stats when you neglect your needs.
2.) When done properly, in the way that I have suggested, getting tired and having to pace yourself at times is NOT tedious (unless you try to run when you are heavily encumbered). Here's exactly what I posted earlier (the part you keep ignoring):
Having your character become tired does not make the game take all that much longer (not if it is done correctly). In FO3, you could run from one end of the game map to the other in less than 10 real minutes. If you used my Tweaks' Encumbrance module; at 60 Encumbrance (with at least 50% health), you could run for 24 game minutes before getting tired . . . which is 6 real minutes at 4 Timescale . . . so you would have to rest once (for like 15 whole seconds) in your run across the map. The biggest difference is that getting tired makes combat more strategic . . . you cannot load yourself up to your maximum carrying capacity and run around in combat . . . and you actually have to think about that sort of thing.
This upsets the exact same players who get upset if anyone suggests making the player's carrying capacity more realistic (like down to a measly 100 pounds), or when someone suggests limiting the number of weapons to the number of weapon slots (like it is done in Mass Effect).