These are indeed pretty ugly, especially by Apple's standards, but someone will probably make something that you can dress them up with given that a lot of Mac users care about aesthetics. Also, I'm finally going to be able to mount my display on a monitor arm, which I've been wanting to do for ages, but I currently have a 30" Apple Cinema Display and they stopped selling the VESA mounts for those ages ago.
For me, this is just going to be a floating black square. I don't care if it's thick and I hope Apple takes notice that a lot of us are buying it for the specs and not because Johnny Ive loves it.. If it's as clear and bright as the iMac's display, it's gold to me.