The one who brought this rumor is Macotokara, a Japanese blog who previously rumored that Apple takes partnership Samsung and LG Display for manufacturing iPad 3 LCD display panels.
However this just a rumor, don't take this 100% true, time will tell whether this one true or otherwise at the time Apple really announces the tablet. Until then take this one with grant and salt.
And additionally iPad 3 is said will be powered by a quad-core processor and includes LTE connectivity. Plus it's going to feature 2048 x 1536 pixels display, 5MP camera at rear and 2MP front-facing camera.