Speaking for myself, I asked a lot of questions late last year and feel that I know what to expect pretty well now. There have been several major magazine articles on the Hy6 as well as information on various web sources, Photokina, etc. I think a lot of people are just waiting to hear that the first Hy6 has hit the shop shelf, and the price.
If your happy with Sinar or Leaf and are exactly 100% sure that Sinar is the "film" you want to shoot your entire career then the HY6 will probably work for you.
Me, I've seen all of these companies go back and forth. First Phase, then Leaf, now Phase etc., and each one is just one bad batch of sensors, or one wrong software decision away from being passed.
Personally I want the option to put any film I want on any camera without cords, adapters and workarounds and I want a variety of lenses beyond the given 35, 45, 80, 140, 210.
You see it on this forum all the time the number of photogrpahers that continue to use or try to use RZ's, Contax, Hasselblad V's, even fuji 680's because they like the camera and want what that system gives them.
Also, you have a lot more faith in these cameras than I do. Out of the 14 professional digital cameras I have owned which covers 5 brands only two have come out of the box working as advertised so I must assume that any new camera and back combination that hits the market brand new, must have a few glitches that have to be "beta tested" out of them before they are ready for large pressured production.
Given all of this, if the Sinar/Leaf HY6 is going to have a chance it better have a lot of product in the pipeline and a lot of support.
Today I was at Calumet New York and they had that big Sinar camera that looks like a huge 35mm. It was on the shelf with no back and nobody really knew the price, the back that worked with it or what lenses were available and how or if the complete system could be purchased today.
No photographer I know will risk there career on a system that is only half on the shelf, especially one that doesn't offer any backup from rental.
Knowing this if Sinar's HY6 is going to be fully adopted they must do a better job of getting the product out there.
I hope the HY6 is successful and I hope it makes other manufacturer's step up and make more cameras with more options, but until I can walk across the hall of a rental studio and pick up an extra lens it's not there yet.