Pretty much!
No, you are right to assume that the appetizers do not make a dinner -- they might hold you off or make you want to eat a lighter dinner, but they are by no means dinner.
The concierge can help you make dinner arrangements or put you on a list to see a show (like the comedy @ City Jazz or the hypnotist), and there is a computer in the lounge to print your boarding passes for your flight home, etc. Other than that, you have pretty much summed up the real perks. Oh, and you do get automatic turn-down service every night with a little trinket (e.g., key chain, lei, stickers, or magnet, etc).
Oh, and one more thing... you do get free access to the fitness center (but you also get that if you are a Loews First member).