The first Raspberry Pi was a nice device. At the time it was ground breaking. The Raspberry Pi 3 looks at least as ground breaking. It's faster, of course, but it also has WiFi and Bluetooth built into it, which makes it a ready to roll, fully connected Internet of Things device. Previously you'd have to use a physical network cable and then directly connect your Pi to the device you wanted to talk to. Now you can do it all without wires.
You can get the Windows 10 Insider Preview that works on the Pi 3 from here.
I've ordered mine.