Looking to try something here with my variety of sizes of openframe touchscreens and a Rock64 4 Gb / 16Gb eMMC drive which is cheaper than a mini Atom PC and will run via POE.
My old Pine64 2Gb computer which is larger than an RPi runs circles around the RPi 1,2 and 3.
Might purchase an available small 7" touchscreen (same as what you can get for the RPi).
Been waiting for an upgrade in hardware of the Rock64 to include an RTC battery. It's been on the list and promised now for over a year.
Footprint of the Rock64 is the same as an RPi. I have read about some video issues / processing et al. I have not used my Pine64 to do any video.
That said here will run emulation for Windows stuff using Wine, PlayonLinux, lite virtual emulator for XP/W7e.
Been able to get Microsoft SAPI to run with Wine throwing the kitchen sink at it but never was able to get the Homeseer MS SAPI speaker program to work in Wine.