From a technical standpoint, these features do make a difference. From a design point, not so much, but when you're using these things for what they were designed for little things likes water proof zippers make a sure difference. I guess it all depends on how you view "technical outerwear"
By design I mean that waterproof zippers and microseams can contribute to a sorta minimalist, techy feel.
I've had a few gore-tex parkas, including some army issue ones. None of them had waterproof zippers and they weren't necessary because most parkas have a placket and stud buttons.
Any additional fabric (i.e. a placket) is going to make things heavier, and arguably more cumbersome. To me, that is the sole "technical" benefit of waterproof zippers and microseams - it reduces bulk. Same can be said for laminated pockets and laser cutting.
These are all relatively minor engineering feats. Since the development of Gore-tex as a waterproof-breathable fabric 40 years ago (and probably not the first waterproof-breathable as Grenfell and Ventile existed long before but are somewhat non-technical), I just can't see much real, revolutionary technical innovation, as much as it likes to be talked up.
Any soldier or tramper will tell you that good kit is nice to have, but you're still going to get hot/cold/wet. Wow, you're made a parka more lightweight? Seems like a pretty obvious thing to do doesn't it? Equivalent to packing a titanium spork instead of a knife, fork and a spoon perhaps. A little overhyped perhaps.
The design is where the real innovation is. Vehicular release zips, hidden pockets, foldable jackets, earbud pockets etc. Add to that a sort-of urban ninja aesthetic and that's where your dollar goes.