Those boxes are small, but not exactly good looking. There's a plethora of companies releasing these compact form factor PCs. They also all look practically identical.

Newegg has a category specifically for these form factor machines: http://www.newegg.com/Mini-Booksize-Barebone-PCs/SubCategory...

All of these "mac mini" style machines target the low end market. They all have low end processors & video cards. I have yet to see a premium machine like the mac mini that is available in a small form factor.