I like the efficient, concentric design, but sitting a couple of feet away from 8 inch drivers can be overwhelming, very intense, in your face. And the bass that 8 inch woofers can produce in a desktop setting can also be overwhelming. And the constant directivity feature would be wasted on a desktop application.
Check out Sound-On-Sound and Audiostream for reviews of active speakers used in desktop settings (that include concentric designs). When reviewing 5 inch and 8 inch versions of the same speaker, Sound-On-Sound almost always prefers the 5 inch.