Samsung's Upcoming P10: Windows 8 or Android?
Tech Radar

Samsung is expected to release sometime this year a new tablet that has a retina display and new processor technology. Codenamed P10, the slate would have 2560 x 1600 pixels on a 11.8-inch WQXGA screen for a 256 ppi -- well within the league of the 264 ppi of the third generation 9.7-inch iPad, which has been touted for its amazing display. The new tablet would be powered by Samsung's next-generation Exynos 5 Dual dual-core mobile processor.

What Else You Need To Know:

- While the Exynos 5 just has 2 cores (unlike the quad-core Tegra 3 CPU), it has a quad-core graphics processor, promising better multimedia performance and playback full 1080p high-definition at 60 frames per second, double the normal rate.

- Remaining a mystery is whether P10 would run on Android Jelly Bean or the upcoming Windows 8 (or Windows RT).

- Samsung has not confirmed the launch date of the P10, but has announced that the Galaxy Note 10.1 would go on sale worldwide in August. UK online retailer Expansys has priced the Note 10.1 at £479.99 (about $754).

Other sources

Customers don’t want copycats, and if they want something that looks like an iPad (either in hardware or software, or both) then they’ll probably just buy an iPad. - Chris Davies, SlashGear  
PC World
Samsung Details Next-generation Exynos Processor for Smartphones and Tablets  

The Exynos 5 chip employs an ARM Mali T604 graphics processor with four cores, and can make screen refresh rates more efficient when reading e-books or webpages, which helps save power, the company has said.

Tech Radar
Exynos 5 Dual brings Retina-like display to Samsung tablets  

It looks like Samsung is ensuring it's well equipped for the next generation of its Galaxy Tab range – with the Exynos 5 Dual ready to take on Apple and its iPad.

SlashGear
Samsung is moments away from a true iPad alternative  

So, Samsung has a pixel-dense display – one we have high hopes for, too, given the company’s track record in panel technology – and the processor to drive it, but that’s not the extent of the new Exynos’ abilities. In fact, running such a screen is really just the baseline.

TN
Samsung is Preparing the First Real Threat to the iPad  

It could be that leaked Samsung P10 uber tablet with Retina Display or maybe another model.

Good E-Reader
Samsung’s Newest Tablet To Take On iPad  

There already are rumors of the tablet having made it to the FCC. Though the listing mentions the product as Samsung GT-8110, it could be a ploy to hide the real thing for a greater surprise later.

SlashGear
Samsung Galaxy Note 10.1 due in the UK on August 16th
ZDNet
Samsung Galaxy Note 10.1 tablet gets UK release date