Sony is still not ready to launch Quad HD smartphones

Most of the relevant Android vendors already have at least one smartphone with a Quad HD (1440 x 2560 pixels) display, but Sony isn't included here. Last year, Sony defended its decision not to make a Quad HD screen for the Xperia Z3, and this year the company is, once again, doing the same thing - this time in regards to the Xperia Z3+ (pictured above).
Jonathan Lin, general manager of Sony Mobile Taiwan, recently talked to Focus Taiwan, saying that the company will launch Quad HD smartphones only when it "can make significant improvements in display quality and digital image processing technology." At the moment, Sony doesn't believe that screens of around 5.5 inches can really benefit from Quad HD resolutions.
What do you think, is Sony doing the right thing by not joining the Quad HD party yet?
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