With the new watchOS 8, you can now track Pilates and Tai Chi workouts. I love the cute little Pilates stick figure on the upper left corner of the screen. It's so cute! I also love that just like the Apple Series 6 would automatically detect when I was walking and remind me to start tracking my outdoor walking workout, the Apple Watch Series 7 automatically detects outdoor cycling workouts. It also automatically pauses and resumes the workout without me having to do anything during my ride.
The fall detection feature is also new for cycling. There is already a fall detection feature for Series 4 and later, when someone falls from say a seizure or heart attack, it will automatically contact emergency services. But on the Series 7, it's able to sense the unique motion and impact of someone falling when they're riding a bike, which is different than if someone fell from just standing. I love this safety feature for road rides, and hope I never need to use it, but it's reassuing knowing it's there.