Great news. Saw that this morning and people are very excited about this.
Some notable Improvements:
- Ethernet is now truly Gigabit as before it was limited by USB bus.
- USB 3 ports instead of just USB 2, and since power is delivered via USB-C there is more power without needing a hub
- dual monitor support includes 4K video
- more RAM options
- CPU is 2x to 4x faster depending on task
- supports 4K H265 decoding
- compatible with all old HATs
- now supports Bluetooth 5
Some Cons:
- You'll need special micro HDMI cable or adapter dongle
- Old Raspberry Pi case may not work unless you cut out port section with a Dremel leaving large hole on side
- still no built in power button (you can add one though)
- WiFi is still just AC speed (no WiFi 6)
- still uses SD card for OS which have limited durability and reliability when used to run *nux OSs
But it is welcome and unexpected upgrade since it had been announced that there would be no new Pi until 2020. What happened is that things went so well in development that what would have been a beta version turned out to be more than good enough to be final production version. But I think there was a lot of pressure to come out with this sooner than later because of so many other competitors like Rockchip that had more RAM and USB 3, Gigabit Ethernet, 4K...etc.