WebAssembly is already revolutionizing web development, with real-world applications demonstrating its potential across various sectors. Let's go through some of the use case scenarios for Wasm:

1. Gaming: Wasm removes the performance handicap of JavaScript, enabling high-performance games or graphics applications. Major game engines like Unity and Unreal have already ported their runtime to Wasm, allowing developers to run games at near-native speed in the browser.

2. Image and Video Editing: Wasm is ideal for implementing performance-critical tasks such as image manipulation, video editing, or even computer vision tasks. Being able to execute such complex computations at near-native speed directly on the client-side has significant advantages for the user in terms of processing time and data privacy.

3. Cryptography: Cryptographic calculations, like hashing and encryption routines, are computationally expensive and often need to be implemented in a low-level language for optimal performance. Using Wasm, these routines can be directly invoked from JavaScript, providing a fast and secure environment for cryptographic operations.

4. IoT devices: WebAssembly can run in resource-constrained environments, making it ideal for IoT devices. Given its low-level nature, Wasm can directly work with device peripherals providing better control over hardware.

5. Scientific Simulations and Data Visualization: Wasm enables running heavy simulations and data visualization tasks directly in the browser, providing real-time updates and interactive explorations of complex data models.

WebAssembly's scope is not limited to the web. With runtimes like Wasmer or Wasmtime, Wasm modules can be executed outside of the browser environment, making Wasm a compelling choice for cross-platform app development.