My NYC EDC for commuting from Brooklyn to Manhattan by subway in a suit and tie:

On self / in pockets / on belt:
Keys
Blackberry
Fox 40 Whistle (on keychain)
Small Buck folding knife (on quick release on key chain)
Fenix P3D flashlight
Watch
Wallet with ID, credit cards, and never less than $20
Rain gear / umbrella as appropriate

In briefcase (messenger bag type):
N95 dustmask
Spare CR123 batteries
Paper, pens, pencils
Lunch
Wind-up emergency AM/FM radio with built in flashlight

At work:
Running shoes and change of clothes
Two Nalgene type water bottles, as well as commercial bottled water in my desk
Additional N95 dust masks
Company provided emergency kit with:
Battery powered AM/FM radio
Chemical light sticks
"juice box" water
Space blanket
Cheap flashlight
Latex gloves

My thougts are that in most any emergency my first concern will be to get myself out of the subway or highrise office building where I am, followed by walking home. The walk shouldn't take more than a couple of hours (even in work shoes), so huge amounts of food and water are unnecessary. I'd have to choose between one of three bridges, though I suppose if it got really bad I could walk through the Battery tunnel as well. (Heck, I've even mapped out a route home walking through the subway tunnels if I had to stay below ground the whole way, but it would have to be REALLY BAD before I tried that one!) At home I have substantial resources for sheltering in place and keepng my family safe and comfortable, so getting there is the primary goal.

Do I have everything I could conceivably need? No
Do I have reasonable resources available to me that I am unlikely to find overly inconvenient to keep around? I think so
Do I have more than nearly everyone around me? Absolutely.