If u remeber in T1 and t2, arnold said his skeleton was covered with ORGANIC TISSUE, which bled, looked real etc. the whole thingi s i undestand the contradicting issue of, if it aint flesh it aint goin, and i agree but u know how movies are, and many people didnt care much for that but rock and jock action by BIG MAN ARNOLD.
also, skynet could still happen as another face (look at Skypage telecomunications, they now have cellphones and hand held organizers that go online- using SkyNet.......)
it woulda been funny if skynet in T3 timeline became like a phone company instead...
i do believe that skynet and the terminator issue still gonna happen simply cause although like this guy said earlier, all they did was stop the terminator stuff fom affecting the technology to advance the skynet system itself. suppostely it was made without the help prior. so wheater the arm and chip was there or not, it was going to happen, sorta like a minority report headache theory.