I was just on the Speed Hockey website and I took a look at the floor they have developed for this thing. It looks interesting but I have some thoughts.
I think you are going to see a box lacrosse style game that is very defensive but high scoring due to how short the rink is end to end. Due to the lack of neutral zone or even any space for a neutral area I think you will see a lot of zone defence.
Having said that I love the wide floor idea. There stands to be a lot of great skating and I expect that the players who will be playing in this league will be pretty short and be required to be great stickhandlers. You will certainly see a very different hockey then we are used on ice or on floor.
The goaltenders will have to adjust to the lack of space behind the net but I think they will have an advantage with no cycling being possible. No wraparound goals and the goaltender will have a much better rapport with the posts and will be able to cut off the angles much much better then they used to. However, there will still be a lot of goals because the shot volume will be in the 60-80 range.