Doesn't look dead to me. Might be a tough shell to throw off. I have helped them get their shells off before. However, it is very easy to damage the cotyledons (the first couple of tiny leaves). If you damage those, you can set growth back a great deal, if it doesn't kill the seedling.

I'd wait a day or two more. Spritz the shell with water to soften it up a little too. If the shell is still there you may want to consider helping it. The way I do it is to use a safety pin or needle and gently *gently* try to get the shell off of it with the tip of the needle. I can't stress enough how careful you should be, especially if you don't have any other seedlings or plants. If all your eggs are in this basket, be extremely careful. It is generally doable though. I've only harmed one seedling, and I've probably helped a couple dozen seedlings pop their shells off. And even the one I did damage did survive, although it took it an extra couple of weeks to recover and get back to growing normally.