Mac book queries

Hi all,

I am planning to buy a macbook cause of its style and OS.
i don't want to go for mac pro cause of its size. i feel it is bulky.
But i'm a novice at mac OS. but from what i have seen, I liked it very much
that i don't want to go for windows,if possible(ok... for gaming alone)

but i have some doubts regarding mac's
1) will i be able to play windows games like PES 6, age of empires and championship manager
2) is there any possibility that the next version of macbook will have a graphics card. if yes, by least when can we expect?
3) what about the transferability of microsoft docs and excel in to mac OS
4) can i network my mac OS to other win PC's
5) how is the gaming scenario in mac world

thanks in advance
chan