Too cold and snowy for you? or don't have enough time for a 45 min spin around the neighbourhood. Get plugged in, digital trainers are the next best thing to riding outdoors without the boredom and loneliness of the past systems.
Tacx, Elite, Wahoo, and Saris to name a few.
Race, compete and train with friends, solo or in a large group ride, everything is possible now. Online community like never before.