That's just an adapter. This new AWS offering allows concurrent connections, and CPU billing vs wall clock time. It's not the same.
But expensive. Stuff like Api Gateway is just absurd (but necessary since you don't want that stuff to reach your lambdas, which are dog slow to handle). Paying per request is like charging for every breath.
Another big advantage (and I guess the reason this exists), is for some reason, AWS lambda is a hostile environment for node, with its ephemeral VMs, performance is quite bad (much worse than expected)