Richard, I don't have an answer for long waits, although ours were not long yesterday (about 30 minutes). However, we boarded in Tucson which is a far cry from LAX or the other "big ones." Do you and your wife use wheelchair service provided at airports? This might be a time to consider that free service.
As far as water for your wife, you can drink it up to the minute you go through security. Then, you can buy more to drink while waiting for the plane (must dispose of before boarding). Once onboard, I'm sure the flight attendants will provide more water for your wife considering the circumstances.
I hope you will go on your cruise. My experience from yesterday was that the airport security and airline employees did everything they could to help passengers through a difficult day. When we stop traveling and make other major changes to our lives, the other side wins! I'm sure that the traveling public and travel authorities will adjust to this new way of travel, just like we did the last time.
Tom, I agree that an unforseen benefit will be less carry-ons on planes. Sure will make boarding a plane much faster! Although, I will admit, I hate waiting for baggage and always fear that mine won't show up.
We fly home on Sunday. I'll report back.