According to reviews, the best tablet of 2013, so far, appears to be the Apple iPad (4th Generation). The Microsoft Surface tablet ranks second (however if productivity and getting work done is top priority, it may be your #1) and the Samsung Galaxy Tab 10.1 tablet ranks third. The Google Nexus 7 is considered by CNET editors to be the best "small" tablet.
Apple was working on the iPad as early as 2002. The iPad comes with the Dual-core A5 chip and a 9.7‑inch (diagonal) LED-backlit glossy widescreen Multi‑Touch display with IPS technology, among other features. They also come with Wi‑Fi capabilities.
In recent news, Apple orders hinted at an iPad Mini shipment decline and a "cheaper" iPad Mini has been rumored as Apple is shifting toward more inexpensive products. Imagination Technologies, a graphics-chip designer that supplies the graphics technology in the iPad and iPhone, offered insights into what could power the next iPad, which includes the PowerVR Series6 Rogue. The Series6 is fully optimized for GPU Compute and designed for OpenCL as well.