The new iPad looks a lot like an iPad Air 2, but it has a larger 12.9-inch 2732×2048 screen, a new Apple A9X SoC, and 4GB of RAM. Between the better specs, the larger screen, and the accessories, Apple obviously intends the iPad Pro to be a more Mac-like iPad, in much the same way that the Retina MacBook is a more iPad-ish Mac.
UK pricing for the iPad Pro hasn't yet been confirmed, but it'll probably start at around £650 for the 32GB Wi-Fi version, or £750 for the 128GB Wi-Fi model. Adding LTE to the 128GB version will raise the price to around £850. The Smart Keyboard will be around £130; the Apple Pencil, £70.
The iPad Pro will be the last of Apple's fall product refreshes to launch, barring any further updates to the Mac lineup. The other stuff announced at Apple's event in September—the new Apple Watch colours, the iPhone 6S and 6S Plus, the iPad Mini 4, and the new Apple TV—is available now, and we also got new 4K and 5K iMacs earlier this month.