AT&T Launches 3G MicroCell Site

This is significantly important for those of us who'd consider an iPhone, but can't buy one because it doesn't work at home. I actually prefer this to a UMA solution, as the model of phone is irrelevant... I fail to understand, however, why this is limited to a particular test market. Shouldn't it be available wherever people have a good broadband connection (such as cities with - ironically - Verizon's FiOS?)