The Raspberry Pi just keeps getting better and better. The 3B+ is the latest member of the Pi family and boasts an improved SoC, Gigabit Ethernet (although hampered somewhat by the single USB channel), a new dual band radio module and it’s capable of Power over Ethernet to boot, with an optional PoE HAT module. All for the same price as its predecessor.
I have two Pi 3’s and they’re awesome. One runs Home Assistant and the other has the Pi Camera Module to run as a CCTV system. I won’t be upgrading them just yet as mine do the job already, but if you’re still rocking a Pi 2 – or even the original – then this looks to be well worth the low cost for an upgrade.