Now that the watchOS 2 software update has released to the general public, a healthy debate is developing amongst my techie friends about the benefits that native apps are supposed to enable.
The long story short, native apps run directly on the device and talk to its underlying hardware and sensors so most tasks should feel faster and smoother than before.
For instance, apps can now play sounds through the Apple Watch's speakerphone and take voice input from its built-in mic. To test how this works in the real world, I've spent a few hours with iTranslate by Sonico Mobile GmbH, arguably the best translator app you can put on your wrist to overcome language barriers, Star Trek-style.