For eggs and delicate fish they are pretty useful. Perhaps not essential by the strictest definition, but I'd hate to be without them.
I have All-Clad and Le Cruset for my cookware and the same for my bakeware (the sheet pans, loaf pans, etc. are AC and the stone stuff is LC).





Also, don't skimp on tongs. Cheaper ones tend to have the locking mechanism slide out of place while using it. Get yourself a fish spatula, but it's enormously useful for everything because of it's flexibility, sharp leading edge, and slots that make it non-stick and drains away grease or other liquids. 
