Jeeze, I will stick with my modular solution: an ipad on a music stand. This is compatible not only with any commodity treadmill, but also bike trainers, ellipticals, and making vroomvroom noises on the motorcycle when it's too icy to actually ride. I could also swap out the ipad for a laptop, non-ipad tablet, or a collection of cute succulents should I desire it. snark aside, I'm a bicycle guy and I really like that…
The accessory part is also pretty neat though. I use a low end exercise bike that came with a snap-on plastic tablet holder. It works pretty well but it got me thinking about hacking the thing. I was finally able to mount a scanner radio, a ham radio, exercise bands, and my phone along with the tablet. Then my kids decided to take it off my hands for a while...I think Dad looked a little too motivated.