1280 x 800 which is the resolution of the 7 inch display on the Google Nexus 7. More speculation has the mystery tablet packing the same quad-core 1.4GHz processor that powers the Samsung GALAXY Note 10.1 tablet. And yes, the S Pen is expected to be along for the ride. At this stage in the game, there is no excuse for not having Android 4.1 installed.
Samsung hopes to compete with the full-sized Apple iPad models with the Google Nexus 10 which was introduced on Monday with an incredible 2560 x 1600 10 inch screen packing pixel density of 299ppi. The GT-N5100, as we said, could be aimed squarely at the Apple iPad mini and considering that the latter has just launched, and with the holiday shopping season staring us squarely in the face, we wouldn't expect the Korean based manufacturer to wait too long to let the cat out of the bag on this one!
source: BRM (translated), SamMobile via AndroidAuthority