This is likely what will first show up on snowmobiles and promises great performance with significantly reduced emissions. The millenium machines offered are just as noisy and pollute just as much as last year's models. This is unacceptable in my book. I don't really know for sure, but I have some ideas. I'm positive money is a big reason we aren't seeing these improvements.
Research costs money and that cuts into company profit.
In my opinion, the manufacturers are making a big mistake. First off, I believe it's a major responsibility of theirs to promote our sport in a positive light. This means they need to be on the leading edge of the issues facing our sport. Face it, if they don't build a responsible product, the legislators will severely restrict or outlaw their use. There have been quite a few positive posts on the snowmobile newsgroup Rec.