So do Minneapolis and St. Paul. Let me tell you, they are an absolute blessing in the winter months. Heck, they're nice in the summer months too if you need to cut across a few blocks and don't want to walk amongst the traffic, or it's crazy humid out.
IMHO, I think they're really beneficial. MSP / STP will never be the urban utopia that everyone sees NYC or random European cities as in terms of walkability; we've gotten what, a foot of snow between two days in the last week? It's not unheard of for weeks of summer to break 90 or 100 degrees F.
Heck, the two cities are only a half million between them; the "metropolitan area" constitutes over EIGHT THOUSAND square miles for a grand total of a little over three million people. Traffic- cars, busses, and light rail- are all here to stay, and that means walking city streets is only as nice as you enjoy breathing exhaust fumes and the noise of tires.