Wireless router in living room next to cable box. dangerous since it's across from couch? not that i am a couch potato but.....

No proved risk: There are no proved health risks from microwave radiation or other emanations that might come from routers, cell phones, and other electronic devices. There's a lot of noise, specualtion, and false information on the internet about this sort of thing, but still no evidence of harm. This really makes no known difference in your health risks.