Apple:

Apple today announced Apple Watch Series 5, debuting an Always-On Retina display that never sleeps, so it’s easy to see the time and other important information, without raising or tapping the display. New location features, from a built-in compass to current elevation, help users better navigate their day, while international emergency calling1 allows customers to call emergency services directly from Apple Watch in over 150 countries, even without iPhone nearby. Apple Watch Series 5 is available in a wider range of materials, including aluminum, stainless steel, ceramic and an all-new titanium. Combined with the power of watchOS 6, users are empowered to take charge of their health and fitness with new features like Cycle Tracking, the Noise app and Activity Trends.

And:

Starting today, Apple Watch Series 5 (GPS) is available to order in 41 countries and regions and Apple Watch Series 5 (GPS + Cellular) is available to order in 22 countries and regions. Both models will be available in stores beginning Friday, September 20.

The biggest change worth noting, at least in my view, is the always-on Retina display. To conserve battery, the watch display is dimmed, but bright enough to make out the important elements, to see the time and complications. Raise your wrist, or tap the display to bring the display to full brightness.

All this, and the battery life is still 18 hours, just like the Series 4.

As to pricing:

Apple Watch Series 5 (GPS) starts at $399 (US) and Apple Watch Series 5 (GPS + Cellular) starts at $499. The popular Series 3 (GPS), with built-in GPS, optical heart rate sensor and water resistance, starts at a new low price of $199 and Series 3 (GPS + Cellular) is $299.

Again, be sure to use your Apple Card if you plan to buy one of these, for the 3% daily cash bonus.