I think the Elder Scrolls is absolutely headed in the right direction, because it is moving away from some of the "traditional" RPG elements of statistics and numbers and moving more toward a realistic genuine roleplaying experience. In the past, these attributes and stats were only included in games as a placeholder for real world traits. I don't have any list of my attributes or stats or anything in the real world, so they are inferior when it comes to realism. The sooner we can take those things away and replace them with a more natural, seamless, realistic experience, the better! That's what TES games have always been about, roleplaying and immersion into a realistic world.
Maybe, but I certainly don't see a trend towards that direction. What you cite as "traditional" RPG elements of statistics and numbers in reality is a trait of early pen&paper RPGs which came from the war game simulation period it evolved from. In the meantime, we've seen plenty of original ideas in roleplaying styles, including diceless, story- instead of character-focussed etc. At the same time, while you don't have a list of your attributes, if you regularly exercise, you would, perhaps, know what your maximum lifted weight is. And you'd know if you were exercising in favour of concepts such as long-term endurance, short-term sprint ability, sheer physical force or general combat-readiness, and there would be some kind of parameters you'd judge your performance by (time for 100 m, how many laps you can run before you're down and out etc.)
I fully agree that roleplaying and immersion into a realistic world is key for a good roleplaying game - I just don't see this as the trend pursued by streamlining of the game engine, quite the contrary. Immersion into a "realistic" world means that if I can slay Almalexia, I can also slay Vivec, and MW gave me that choice. It even gave me the choice to slay Vivec the first time I met him and STILL finish the game. Compared to that, the choices that Oblivion gave me in terms of the main quest were by and large how much work I want to have cut out for myself in the defense of Bruma - i.e. do I recruit support from more or from less towns. I didn't have the choice to say "Screw Martin, if I can take out Jyggalag, I can take out Mehunes Dagon, too" (which might not be the case given that Jyggalag at least subconsciously wanted to be beaten, but...)
An immersive, realistic world means one thing first and foremost: Choices. Plenty of choices to make. Oblivion, alas, had me work my way through a laundry list someone else had prepared. I hope and pray this will be different with Skyrim.
(Heck, I am someone who while loving the fact that you had tough choices to make in "The Witcher" disliked the limited options. Given how extreme both sides were portrayed, there should have been an option besides "Support side A", "Support side B" or "Tell them to leave you alone" - and if it is "Beat some sense into BOTH sides", though realistically, a minimum chance to talk some sense into one or the other member of each side could be expected as well)