Usually if you decide you want to develop games for those platforms, you can contact them for access to information about programming them, or gain developer access to the tools used/methods/techniques used to make games on them... often to become a developer (the 'inner circle'= for one of these platforms requires a membership that is not always free (the cost of the tools usually).

From what I've heard, nowadays a company or group that wants to develop on a console system, (at least most of the newer ones) must "prove" their abilities on a...how did they word this...open development system, such as computers.

Kamoku wrote:

From what I've heard, nowadays a company or group that
wants to develop on a console system, (at least most of
the newer ones) must "prove" their abilities on a...how
did they word this...open development system, such as
computers.

Yep, I hear that too...

Basically, to make things short, C++ is not completely OO
because it is based off C, which is not OO...

Correct. But it does try...