What?
Just imagine... creating integrity constraints just by tracing a line between two tables. Add voice recognition software and you could even combine the UI technology with verbal commands - create index, primary key, add check constraint. Or within an IDE, dragging and dropping JSF, Swing, or (retch) ASP.NET components. Using your fingers to resize elements on Class or ER diagrams, or borders for UI components. Sweet!
Be careful there, you might turn archy on!!
Funny enough, while I was reading that post I figured I'd respond with "I'm wet", but you already saw that coming.