Apple's new MacBooks and MacBook Pros implement the same idea RIM implemented in the Storm (see previous post). They made the entire touch surface a button. From Apple:
It all just clicks.
The first thing you might notice — or not notice — is the missing click button. Now the entire trackpad is the button, so you can click anywhere. Without a separate button, your hands have 39 percent more room to move on the large, silky glass surface.