Its not cheap, but I think any serious cyclist should save their pennies and buy this virtual reality system some day. Tacx have really done a great job here.
Indoor training has come to the virtual age and those who have it, you'll be better off than the rest of us with our ipods, spinervals and WCP vids. You can ride the famous cols, and even one better, ride with the pros. The system is so smart that it tracks your speed and keeps them just in front of you, so its like you never get dropped. Its nuts ! I love it !!
Virtual Paris Roubaix - You won't feel the cobbles under you, but can still see the route.
You can ride with your heroes
Again, this is money well spent. If I had this system, I'd be a Senior 1 easily.