I don't see too much difference between cables hanging off or dongles having off, both are messy.
I plug the cables in at my desk. But, I have to walk around with 2-3 dongles attached to the system. See the difference?
So, you will never, ever get peripherals with USB-C ports? You will never, ever switch from, eg, a USB-A to Lightning cable to a USB-C to Lightning cable? You will never, ever switch from a USB-A to USB micro to a USB-C to USB micro cable? You will never, ever switch to a USB-C or TB3 monitor?
I have USB-A keyboards and mice already. USB 2.0 is appropriate for them, BTW-- no significant bandwidth requirements. I have USB-A memory sticks. I have several other USB-A dongles for different devices and purposes. I have DVI and DisplayPort monitors. (Why I need two DVI dongles now.) I occasionally use a TB storage system, along with the USB 3.0 and FW 800 that I already have. (Yes, I have a TB to FW800 dongle right in front of me 4 feet from my eyes at this moment.)
Could all of this be replaced by USB-C. Maybe, eventually, but, monitors turn over slowly and never have enough of all the possible inputs you want. RJ-45 Ethernet will not go away any time soon. In many workplace locations, a combination of local security measures, office environment issues (e.g. solid reinforced concrete walls in some building locations), and bandwidth requirements (especially backups, which everyone needs) will keep wired Ethernet around for a long time. Not to mention that Cat-5E/Cat-6 are already there, and configured the way they want them.
And with the alternate modes of USB-C, you can have USB-C to DP or HDMI cables (yes, cables, one end of which you plug into the USB-C port of your computer and the other end of it directly into the DP or HDMI port of your monitor). Yes, you'll need dongles (or a dock) for Ethernet and DVI, but for the latter you have needed a dongle since 2008, and for the former since 2012.
I don't accept the Ethernet situation. That was a dumb religion-driven mistake on the part of Apple. Agree about DVI when needed. Sometimes you can leave that plugged in at the monitor, although you have to be careful about losing those things also. Thankfully, VGA is relegated to the bottom of the dongle pile as I don't seem to need it any more. HDMI is the alternative to VGA, and, that is what I normally plug in to.
Likewise, HDMI connections are rather different, actually, from USB-C requirements, and I do already have a use for HDMI 2.0a/HDR/HDCP 2.2 today for 4K TV. 4K is here now and some conference rooms have large TV-type displays (e.g. 65").
So, you will not have your view ruined by having all the dongles hanging off your computer because mostly it'll be just different cables (for Lightning, USB-mini, USB-micro, USB3, DP, HDMI) or it will be same dongles you are used to for many years (DVI, Ethernet).
Single-cable dock solutions (that provide power and data via either USB-C or TB3) reduce the clutter that is ruining your view by half, by only requiring one instead of two cable connecting to your laptop. But I guess since you don't care about visual clutter, this has zero utility for you (or anybody else).
I would prefer power to be separate -- no, I don't really see the utility of one cable instead of two. I appreciate the docking station solutions, but, in order to have USB-A ports on the move, HDMI on the move, Ethernet on the move, I need a portable docking station that is powered from the USB-C cable, not vice-versa.