Is this all just an exercise or are you really going to build the do-it-all table?
Personally, I think trying to build a table that does it all, fails at all the jobs. You end up with a table that does everything poorly.
+1 here. The title of this thread asks for the "Ultimate" work surface. Each task that the OP outlined has a different "ultimate" need, with the best material for one task being a compromise for a different task. The "Ultimate" solution would be a separate workstation for each task with the "Ultimate" material at each location.
Welding/metalworking: Thick steel plate
Disassembly: Drain table
Pounding: Anvil
Layout: Granite, machined steel, cast iron
Assembly: Clean room countertop
Wood working: Thick wood top
Picnicing: Plastic laminate or solid surface
Poker night: Felt covered table
Afternoon quickie: Any of the above

I believe what the OP is really asking for is "With space being limited, what is the best compromise work surface material for all these different uses?"
What about a thick steel top for heavy duty work, but then making a few separate lightweight covers that can go on top of the steel for lighter/cleaner tasks? The covers could be hardboard, plastic laminate or even cloth, depending on the need.
Dale


The same top can be used for the back of the dart board, unless you play poker and darts at the same time.
