Google Maps. Material design. That's pretty much all I need to say, right? Here it is.
The new version of maps isn't just a visual overhaul, though - a few functional tidbits are packed in as well. Deeper Uber integration will allow you to see the estimated pickup time for an Uber, as well as the estimated fare based on the directions you're currently seeking under the transit or walking direction modes.
OpenTable integration is packed in, too, allowing you to reserve a table right from a restaurant's Maps info card, which is certainly pretty nice. Otherwise, most of the changes are design-oriented, and you can read a bit more about them in the LatLong blog post, right here.
Update: Here is the Maps 9.0 APK. Enjoy.
The APK is signed by Google and upgrades your existing app. The cryptographic signature guarantees that the file is safe to install and was not tampered with in any way. Rather than wait for Google to push this download to your devices, which can take days, download and install it just like any other APK.
File name: com.google.android.apps.maps-9.0.0-900029124-minAPI18.apk
Version: 9.0.0 (900029124) Android 4.3+ (Jelly Bean, API 18)