Looks like BMW is going to move torwards the hydrogen ICE
in the long term. I think they are following Hondas' path
in this direction. I hope they can figure out a renewable
energy source to extract this fuel in an efficient manner.
We are really going to take it in the shorts, if we have to
subsidize the roll out of hydrogen fueling stations on
every street corner. There is this thing called "battery
technology" and it is going to make ICEs' of any ilk, seem
antiquated. The refueling infrastructure is already there.
Go figure.

The rest of the world will go electric, for which we already have an infrastructure.  If BMW thinks it will be able to establish a hydrogen infrastructure just for them, I'll watch with great amusement.

"Looks like BMW is going to move torwards the hydrogen ICE
in the long term. I think they are following Hondas' path
in this direction."

BMW's push for hydrogen ICE is more like Ford and Mazda, while Honda (and GM) development is based on fuel-cells. They may all develop with hydrogen in mind, but it's not the same technology, and the efficiencies are different.

I also have my doubts about a hydrogen infrastructure, but I'd rather see it apply to fuel-cell than ICE.

It seems that manufacturers dragging their feet with the development of Hybrids + PHEVs + BEVs are promoting the hydrogen (ICE or fuel cell) path requiring very costly new infrastructure.

Series PHEVs with (lighter, lower cost, longer lasting) electric drive trains, make much more sense and could easily develop to full BEVs when electrical energy storage units become smaller and cheaper.

Electricity is everywhere. With the exception of low cost (private and public) charging stations, no new infrastructures would be required. Toyota will be the leader. Others will have to catch up.

The PHEV makes so much sense to me--all the infrastructure already exists for most people (gas stations, electricity at home). Raise the gasoline mileage of the average car to 100mpg and everything changes. I believe the 'short-term' PHEV solution could make the hydrogen economy fantasy recede into oblivion.

That's what the oil interests have to be afraid of, which is why everyone associated with oil is pushing hydrogen, or corn ethanol, or some other diversion.

Darn..... I have a 535i on the way. I've always wanted a 535d. That's about optimum for me. 40mpg highway, 0-60 in about 5, nice :)

Can I run it on bio-diesel?

BMW has the right idea. Hydrogen in a cimbustion engine is ideal. Because you may think that your little souped up golf carts that run on electricity are nice and eco friendly. But most of that power is coming from coal, which is not very clean and good for the environment. Besides, some people appreciate the art which is the combustion engine. Not everybody wants to drive around in a little car with some little pansy electric engines.
We want clean engines that offer torque, power, and high compression ratios. The Hydrogen Combustion Engine is the next thing.