The modern aero helmets (Giro Air Attack) and urban helmets (Nutcase, Bern) look rather like many of the vintage helmets shown.
I have an Air Attack and and Air Attack Shield, like them both. I also stumbled across one of those Giro Livestrong carbon fiber-shell helmets on a clearance table. It's fine. However, in planning for the Dairyland Dare, to ride an 80's bike, I figured I needed an 80's helmet to go with the kit. Yep, major phugly, and I'm not sure it protects anything. I'd much prefer wearing my Bartali cap, but the event will not allow it.
It's nothing but a styrofoam bowl with a hair net over it. But it at least will match my tube socks.