Microsoft may be tight-lipped about what will be revealed at its October 6th device event, but that doesn't mean that everything is a mystery. In some cases, a slew of leaks have telegraphed Redmond's plans in advance. More Lumia phones, anyone? However, there are still a few questions left. What about the fabled Surface Pro 4? When does Windows 10 reach your existing phone? And will there be any wearable tech? We'll answer as many of those questions as we can so that you have a good idea of what to expect when Microsoft's execs take the stage.