I’m not a big tv watcher or radio listener, so I personally don’t care very much about interference. I’ve read any number of accounts where TV and wireless internet reception has become a problem, but I haven’t followed up enough on these reports to tell if the problem is very large or not.
There is, however, a problem with wind turbines and Doppler radar. The NWS radar outside Buffalo has been getting interference from turbines 30 miles away, interference that cannot be easily filtered out, as it appears to be moving. There’s also been problems in the midwest, where storm and tornado warnings are quite important.