Also take care that probably every serious home automation setup will feature quite a number of additional devices such as your broadband and/or WiFi router, a number of gateways into various technologies (such as a MAX! cube, Chromecast, a Hue bridge, a Homematic CCU etc.), a switch, eventually a NAS, and so on. Most of these neither look nice nor are available in DIN rail or 19" rackmount format.
There’s little point in having a fancy-looking server sit next to a lot of devices, some of which are ugly, and all of different design, with a lot of cables inbetween. You could have a shiny server but in the end, your “data center” doesn’t look nice anyway. Cross-check with this thread.
