I have been working with and programming these RS485 Home Automation accessories for several years now, and have made improvements in the crap I have had to carry along the way. I have modded my Asus EEE PC 701 with a touch screen, I had an early Lenovo laptop that converted to tablet mode, and I was about to also try a cheap Win8 tablet as a way to run the simple Windows programs and have portability.
I then picked up this Acer Laptop for about $175 on sale and I looked into adding RAM or an SSD to slightly improve performance. Once I saw the YouTube video below I realized there was room inside of it to add other components. Ideally I could do without a touchscreen if I had the ability to eliminate the following things I carry: a serial adapter, a POE power supply, a couple of CAT5 cables. Besides carrying these parts, I have to find a place to plug them in to mains and a clean area to lay it all out. Sometimes my jobsites are not that clean or don't have mains power available.
So a Laptop that could power an accessory that draws 10mA at 12-24V and communicate RS485 directly would make my life easier.