Here are some really menial WIBNI's (wouldn't it be nice ifs):
Sunscreens that can be positioned single handed
A charging point for laptops, mobile phones, Electronic Flight Bags etc.
Rubbish/wastepaper bins that can be easily emptied and cleaned
A dimming system that enables ALL cockpit lights to be dimmed
Somewhere to stash active paper work and a fixed clipboard
Somewhere to stash old paperwork
Somewhere to stash manuals
Digital manuals with a proper index so you don't have to go to the one above
A guidance panel with lights above the selected mode with values shown in windows on the panel as well as in the PFD/ND
Automatic altitude arming (change the altitude and have ALT armed automatically)
A live VS wheel
Heading/Altitude/Speed knobs that you twist to arm, push to hold and pull to select.
PM