Google just announced the Nexus 10 tablet with a retina stabbing 2560x1600 display. Another way of saying it is that it has a 4 megapixel display - the iPad with retina display has get by with a blurry 2048x1536 display.
It's powered by a dual-core ARM Cortex A-15 processor which has a Mali T604 GPU. Don't let the dual cores fool you. Cortex A15 cores are more advanced than Qualcomm's Krait cores and ARM's own Cortex A9's.
You also get 2GB of RAM, 5MP camera, WiFI that supports 40Mhz wide channels. Other goodies include a micro HDMI port, magnetic power connector, and a huge 9000mAh battery.
It will be available in 16GB and 32GB versions. The 16GB one will be $399USD/$409CAN while the 32GB is $499USD/$509CAN.
On paper it's a pretty insane tablet - the problem is that I'm not sure many people are going to fork out $399 or $409 CAN for an Android tablet. Don't get me wrong, you get a ridiculous amount of hardware for your money. The thing is, Android doesn't quite have the same rep that it does in the phone space. $399 is really pushing it.