Looking exactly the same as the mid 2012 MacBook Pro, the latest in the 15-inch range, as expected, gained the new Haswell CPU from Intel. But there were other changes. The two stock options are firstly, for NZ$3049, a quad-core 2.0GHz Core i7 CPU and a quad-core 2.3GHz Core i7 in the NZ$3999 model. The low-end model ships with 8GB of RAM and 256GB of PCIe-connected flash storage while the high-end doubles both RAM and storage. Of course, you can option them up further - see those on Apple's site after you click the blue Select button under a model.
The 15-inch's two Thunderbolt ports have been upgraded to Thunderbolt 2, backwards compatible with Thunderbolt - you'll need Thunderbolt 2 devices to appreciate any increase in data throughput.
The other connections are the same: two USB 3.0 ports, HDMI, an SDXC card slot, headphone jack and the MagSafe 2 power connector. Wireless is the new and faster 802.11ac Wi-Fi - once again, if your network is below this standard, it will step back to the top speed of whatever is served - and it has Bluetooth 4.0.
But perhaps the greatest change is that this new range is the first in the 15-inch size that Apple has produced without a discrete video card, since the lower-priced only has integrated Intel Iris Pro Graphics with 1GB of VRAM; the other has that plus an NVIDIA GeForce GT 750M with 2GB GDDR5 memory. In the latter's case, it switches between the cards depending on what you are doing, and favours the less demanding integrated graphics while on battery.
I got to test a version of the new 15-inch with Integrated-only graphics. The Maxon Cinebench results were 27.43 fps for OpenGL and a figure of 564 for the CPU. The Haswell-equipped iMac I tested a couple of weeks ago showed 81.46fps OpenGL for its NVIDIA GeForce 775m video card, and CPU at 520. My own 2012 MacBook Pro, with its 1GB NVIDIA GeForce GT, resulted 48.09 fps OpenGL, so even this is well ahead of the built-in graphics capabilities of the new 15-inch with Integrated-only graphics.