Still looks like peering to me: https://www.netflix.com/openconnect/guidelines

Even if you can colo with Comcast (which I can't find any information about online) you're still not direct-peering with their AS, which is what Netflix is asking for with Open Connect. I'm sure they'll also charge you for bandwidth. This is definitely different than putting a box in a colo facility. This is putting a box in a peering location and eliminating the transit cost and performance hit.