This could make chaining more readable (reduced the need for parentheses), for example

// before
(await fetch()).props
await (await someAsyncMethod()).someReturnedAsyncMethod()

// after
fetch().await.props
someAsyncMethod().await.someReturnedAsyncMethod().await

Hmm, I didn't notice that. It is similar, but I think spelling out .await is a bit more readable than ~.?
There is another example:

async function someFunc() { /* do something and returns 3 */ }

// This produces the intended behavior though to me it feels somehow odd
await someFunc() + 5

// This is feel more natural since it is certain that we get an awaited result and added it by 5
someFunc().await + 5