This doesn't seem too awful to do with a function instead, and doesn't require any new language syntax or features.

  async function concurrently(obj) {
    const kvlist = Object.entries(obj);
    const resolvedValues = await Promise.all(
      kvlist.map(([_key, promise]) => promise)
    );
    return Object.fromEntries(
      kvlist.map(([key, _v], index) => [key, resolvedValues[index]])
    );
  }
  
  // Usage
  // This could also be const {user, session} = ...
  const info = await concurrently({
    user: Promise.resolve(3), // or just 3
    session: new Promise((resolve, reject) => {
      setTimeout(resolve, 100, "foo");
    }),
  });
  // info = {user: 3, session: 'foo'}

You're left with having to get at your results via dot syntax, or having to duplicate the object keys to destructure them, but you'd have to do that with Promise.all() anyway. This lets you make the definitions declaratively.