The first change is a new edge-to-edge display: 15% bigger than before. Apple has achieved this by reducing bezel around the sides, just like with the iPhone X. The Watch is in a nice new Gold colour, which is the same as the iPhone XS image.
Taking advantage of the bigger display, is a new watch face that shows so much more information than before. The analogue face shows eight complications round the clock, and near the clock hands. We haven't seen digital watch faces leak, but it's likely Apple has designed some new ones.
We can also see in the image a new hole next to the side button and Digital Crown - probably another microphone. The image shows compatibility with older watch faces. Talking design changes, we can see the Digital Crown is slightly different, and the side button has been modified.
The image is real andNOT a mockup. They are likely promo images for the Watch.
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