Well, if it means that a lot of competition in the appstore disappears, I only see an advantage in it for myself. But I guess that the "big players" will very soon find workarounds, so that it doesn´t change much.

How do you want to find a workaround? You have to use an Apple compiler with C, C++ and ObjC.

But there are alternatives like this one:
http://www.edgelib.com/

It is a pure C++ multi-platform engine and supports almost all mobile phones plus Windows, Linux, ect.

C4 is told to be ported to iPhone also and it is pure C++, so it also will be not an issue.

But Unity, Flash and maybe Torque will suffer a lot.

theoretically they could do a c# to c compiler.

Not only on the unity forum, on the Apple developer Forum are also many people (maybe the same?) who wants some clarification from Apple (I can't go into detail because I'm bound to the NDA, sry).

So the question is; Why should Apple do this?
I think that it has some legal reasons, cause when a third party framework developer fucks the whole system, Apple gets bad press and must wait for the third party dev to fix the thing. But if there is something wrong with an framework from Apple, they can just fix it in very short time with an OS update. (Thats my personal opinion and nothing from the dev Forum and/or the Beta SDK!)

Yes, this is what Steve Jobs wrote in some of his emails. But is there a good framework from Apple? Is there any game engine from Apple, physics layer, sound engine, collision detection, scene management? Or is each developer now doomed to program its own system from scratch? Is this the step back to the middle age of programming? Back to the pointers, memory allocators and pointers to pointers to manage stacks, get rid of good garbage collection and powerful function libraries?

Weren´t you the one posting for example edgelib above?

Yes. Although edgelib is C++ (with all known advantages and disadvantages), it at least offers some function libraries.

i just got the free version of unity. i must say that it is good. i still will work with 3dgs though. unity will be more of a fun thing.

http://blogs.unity3d.com/2010/04/24/car-tutorial/

finally they have posted their car tutorial. looks very interesting.

i am sure a lot of stuff can be learned from it that can also be useful for gamestudio projects.

Yeah I already got the car tutorial
It's really amazing!