[ank286]

Google Glass has a processor. Processors give out heat. Google Glass will lead to sweaty eyebrows -- eww. How do you solve the heat issue when Google Glass is transmitting/querying images? Transistor sizing dissipates more and more heat.

[mowgles]

This is definitely a problem, but I think it's an easier one to solve than the unknown effects of radiation (assuming some version of Glass has a 3G/4G antenna built in). If holding a cellphone to my ear makes me nervous, what makes you think I'm going to wear Glass around all day?