I think the difference here is the benefits of a virtual keyboard outweighed the drawback of no tactility. There are no functional benefits to making the home button flush, just a loss of accessibility... the home button as we know it, though.... Probably what they'd do is they'd make the entire bottom bezel area a force touch home button of some kind. Then the home "button" would be invisible but even more accessible (and you could do cool finger gestures and stuff)."I LOVE being able to find the keyboard by feel and not having to specifically look down at it every time."
A BlackBerry user, circa 2007