3/14/18 (which is also Einstein's Birthday and Steven Hawkins Death Date), the Raspberry Pi Foundation released another Raspberry Pi into the collective. It is not a new Raspberry Pi but an update of the Raspberry Pi 3 (Model B), and is called he Raspberry Pi 3 B+.
 
Its updates the Raspberry Pi 3 with a faster CPU/GPU (1.4GHz) and faster USB and Ethernet Ports. It also adds PoE (Power over Ethernet) so one can power their Pi over the network by the network.

• A 1.4GHz 64-bit quad-core ARM Cortex-A53 CPU
  
• Dual-band 802.11ac wireless LAN and Bluetooth 4.2
  
• Faster Ethernet (Gigabit Ethernet over USB 2.0)
  
• Power-over-Ethernet support (with separate PoE HAT)
  
• Improved PXE network and USB mass-storage booting
  
• Improved thermal management
  

 

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Raspbian OS has also been updated, mostly with the Display options of the OS to be faster and cleaner. But this update/upgrade may not be compatible with Older and Single Core CPU Pies like the Pi 0 and Pi Model A+. The Single Core Units use the A6/A7 ARM CPU, while the others (Pi 2, Pi 3 and Pi 3B+) are quad core CPUs and the update is geared to the Quad Core CPUs.
 
You can use the link to download the OS:
https://www.raspberrypi.org/blog/raspbian-update-screen-sizes/
 
Or if you have the last Raspbian Stretch version, you can use the commands on the telnet console:
sudo apt-get update
sudo apt-get dist-upgrade