What's the price for that? Ideally, tell us what it's called and/or give a link. I will say that it doesn't look like a very good computer, and that the only reason it'll do for simming is because sims is designed to run on a wide range of machines.
More generally, laptops cost more than a comparable desktop because parts thin enough to fit comfortably inside a laptop cost more than parts that can be plugged into a larger tower. All-in-ones tend to be laptop thin and thus ask for the laptop part premium, while still sitting on your desk. So they can work, but unless you really like the look of them I don't know that it's worth paying that extra premium.