Microsoft's BUILD developer conference is upon us and with it comes bits and pieces of Windows 10 that may or may not arrive in July. But along with the new operating system, there is a good deal of speculation about Microsoft hardware to go along with it. Yes, it's now time to speculate about the Surface Pro 4, and Chinese site 36kr.com claims it has the scoop on some of its upcoming features. Good news for fresh new Surface Pro 3 owners: you need not regret your recent purchase. Yet.