Certainly outdated. Most are unconstitutional. Only two and a half of them are parts of modern American law, and there are some pretty glaring gaps.
Taken from the King James version:
1: I am the lord thy god, and thou shalt have no other gods before me. (Unconstitutional. Requiring religious allegeance is one of the things that the US and modern society exists to oppose.)
2: No graven images. (Unconstitutional. See 1.)
3: Do not take the name of the lord in vain. (Unconstitutional. Free speech. Also kind of vague, as people keep disagreeing about what this actually means.)
4: Keep the sabbath day holy and do not work on it. (Could theoretically be enforced, but isn't, and would likely be an unconstitutional infringement of liberty. Also Christians keep forgetting that this is Saturday, not Sunday.)
5: Honor your parents. (Not really enforceable. The first amendment allows us to honor whoever we want to, or not, as we like. Also, some parents are awful and oughtn't to be honored.)
6: Do not kill. (Some people say murder, but that's just a semantic argument. This one is an American law. 1/6 so far.)
7: Do not commit adultery. (The right to choose our sexual partners is definitely constitutionally protected. This may usually be a good idea, it is certainly not something that the constitution allows us to make a law about.)
8: Do not steal. (2/8.)
9: Do not bear false witness against a neighbor. (Sort of. Lying in general is certainly legal, but not under oath. Ancient Hebrews didn't have much of a real legal system, so we'll give this one half credit. 2.5/9.)
10: Do not covet. (Again, a state of mind and thus constitutionally protected. Also the foundation of capitalism.
Meanwhile, it forgets pretty basic ideas like do not rape, do not keep slaves (both of which are essentially endorsed in the bible), do not assault people. In fact, those three rules' absence is especially telling towards women. By biblical rules, a man can pick out a woman he's interested in, rape her, pay her father the biblical price and then she is forced to marry her, and then she is required to submit to him sexually and he can beat her in order to make that happen. That's entirely in line with biblical laws, and the ten commandments do nothing to stop that.
There are a few parts of the ten commandments that are okay, but they're the obvious parts like stealing and killing. These ideas are obviously not exclusive to this list and no one ever needed this list to know not to do that. There are some that might be decent guidelines, but aren't enforceable as law. Again, not unique and not needed on a list. And there are some that are just demanding adherence to a specific religion, which is evil. It's an interesting historical document, but hardly a comprehensive list of moral tenets and pretty outdated, along with a lot of other rules in the bible, like murdering witches and segregating women on their periods out of society.