Since some weeks ago, Samsung rumored to presence some tablets in Galaxy Tab 3 Plus lineup including SM-P900 (3G version), SM-P901 (Wi-Fi only version), and SM-P905 (LTE version). The information obtained from user agent profiles of official Samsung website confirms that Galaxy Tab 3 Plus will be equipped with high resolution display, 2560 x 1600 pixels.
A new proof shows that Galaxy Tab 3 Plus is not a 10.1-inch tablet like current biggest Galaxy Tab, but it will have a 12.2-inch display. A database form India import/export shows that SM-P905 will be equipped with a 12.2-inch 2560 x 1600 pixels display, converting to 247 ppi pixel density. The pixel density is still under Apple iPad Retina (9.7-inch, 2048 x 1536 pixels, 264 ppi). However, 247 ppi is not bad for a tablet.
Most likely it will be announced at IFA 2013 in Berlin in the late of August together with Galaxy Note III.