Yup. Been in modern-ish cars that just keep beeping and flashing lights on the dash until the seat belt is clicked in. That said, it's only when some weight is added to the seat, else it doesn't care.
I'll bet someone a little younger than I am would think these were great and would want them fitted to their car instead of regular seat belts. "Much more comfortable, just as safe, bruv".
*edit typo.