The first thing that strikes you are the 6 front-firing speakers.
Dell put a lot of thought into the design of the speaker grills.
The system generates a lot of heat, so Dell put some venting on the top.
Dell's curved Bluetooth mouse is curved.
Almost all the connectors are on the back of the display, under the stand hinge. I find that design hard to access.
An SD card slot and headphone jack are on the bottom left.
The power button and USB 3 connector that can charge devices are on the bottom right.
All of the guts are in the display, so the base is pretty small.
It's thicker overall than the iMac, but it doesn't bulge out in the middle.
The recess makes it hard to get your fingers in to plug and unplug cables, as well as hard to see the connectors without turning the machine around.
Cables feed through a hole in the back of the stand, like most monitors.