As it happens, Samsung issued a warning about its upcoming quarterly earnings literally hours before Walmart’s decision to discount the iPhone 5c to $29, apparently permanently. Oddly enough, smartphone chip titan Qualcomm’s share price has started lagging NASDAQ since early June even as overall tech investment sentiment remains giddy. Isolated events? Or omens of high-end gadget sales slowing down? Unfortunately, it’s probably the latter. We’ve known for months that market growth for both high-end smartphones and tablets has started coming down faster in 2014 than anyone anticipated. In India, tablet revenue growth has slowed down dramatically, dropping to just 32% in the year ending March 2014. Rumblings about China’s weakening smartphone market have rolled around for months. Way back in February, Gartner noted