KitGuru tried the PowerNAS CMA 8TB
A quote from the article:
PowerNAS has used a novel approach during the development of the CMA (it stands for Converged Media Appliance). To their way of thinking this Windows 8.1 PC can act as a replacement for three separate pieces of hardware and bring together the home PC, media centre PC and NAS Server in a single device.PowerNAS CMA 8TB Review @ KitGuru