How big of a tv/monitor do you plan? I read some descriptions of there console(not mame) driving cabs. I haven't seen one with a bigger screen than 27 inches. I play Gran Turismo 3 at a friends house who has a Sharp 36" Tv and I am not impressed. My tv is smaller and CHEAP though. My point is don't go too big and too cheap at the same time.

Still on the tv/monitor bit....
The seat looks too low. My suggestion is raise the platform a bit so you aren't so low. Secondly, it looks like you are going to use a real car seat. If/when you raise the platform, don't raise it so high that the car seat obstructs your view. My suggestion here is to make sure you can push the seat forward when not in use.
Where are your pedals for the driving setup. Gotsta have pedals.
Is this for mame only? Or will you be using consoles?
I have more ideas, but only if you are considering using consoles for driving games.
Now, on to your podium. For best performance, I think you will want to incorporate two stratigies.
First is the rotating control panel for multiple control panels.
Secondly, a swappable control panel that sits on top of your rotating cp podium. On this, you can have your 360 wheels. as pictured. Also you can have another for your star wars yoke.
Thirdly, where are you going with the guns? I have a pair of those T2 guns, and the are heavy mother suckers! Even after you remove that base on the bottom of the guns, I imagine they'll be to heave to play a "lightgun" game.
Just thought of this. Someone here told me that the average distance between the podium and display was less than 2'. Having said that, your podium might be too far from the display.