No exact specification can be set from this standpoint. However, it can be said that the GPU has come on-chip memory thanks to a previous teardown done by Nintendo themselves. This also means the die size increased as well. To picture it otherwise, take a 104mm2 Redwood core found in the Radeon HD 5670 and add some megs of eDRAM. Naturally, this is close to the 156.21mm2 die size the Wii U's GPU contains. The people at Extreme Tech assume that a 40nm process is being used. This type of GPU is definitely a force to be reckoned with.
Unfortunately, the CPU will not be able to do wonders for the console. The small multi-core Power-based CPU was made based on IBM's 45nm SOI process and it also has on-die eDRAM. The CPU is still a big mystery and it is rumored the Wii U simply took the Wii's Broadway core and multiplies it by three, since the Wii U is backwards compatible with the Wii. Extreme Tech suggest adding a few process node improvements and the Wii U's CPU would be "fairly competent".
Now, even with bad battery power, the Gamepad has pretty wireless capabilities. Although the 6.2-inch touchscreen between your hands can be used for different needs (full gaming, mirrored screen or HUD-style display), the Gamepad functions thanks to a high-speed 802.11n WiFi connection which probably works perfectly up to 7.5m (25 feet) away from the console. Thanks to Anandtech's teardown, the Gamepad also has two WiFi antennae and controllers: one for online network connection and the other solely to ensure the Gamepad works flawlessly. This can be proven via gameplay as no lags or slowdowns occur from the Gamepad.
In terms of power consumption, the Wii U is very efficient as it uses only 31.2 watts in the main menu and 33 watts when New Super Mario Bros. U is popped in. This is probably the work of IBM and AMD making sure to pare down the power needed. Also, as many know already, Nintendo and Opera have not worked together this time. Like many smart devices today, the Wii U uses a WebKit-based browser made by NetFront, the people behind the browser for the PlayStation 3, PlayStation Vita and Nintendo 3DS. The browser on the Wii U has excellent HTML5 support and JavaScript performance.