QBox wraps async operations in a lazy proxy. The value exists in "superposition" until you observe it—then the box disappears and you just have your data.

    user = QBox(fetch_user())       # starts async, returns immediately
    score = user.score * 2 + bonus  # chains lazily, still no blocking
    if score > 100:                 # observation happens HERE
        print("High score!")

No async/await spreading through your codebase. Pure stdlib, Python 3.10+.