It's probably mostly ergonomics. The standalone monitor is 24". I more regularly use a mouse when working at my desk. My posture is better sitting on a chair rather than on my couch. The stand I use keeps the dongle out of my way better.

The lapdock is for portability. I use it on the couch and on the road. I have a mouse and stand for traveling but rarely use them at home.

My impressions of the build quality of the NexDock Touch are absolutely my own opinion. My intent isn't to ruin the experience of anyone happy with their purchase. I can only speak for myself. The Omiodo reminds me of other premium equipment I have owned. The NexDock reminded me of other budget or mid-range equipment.