With phones screen sizes are all fairly similar, 3.5 - 4.? inch screens and developers accommodate for these screen sizes. Tablet's are different, an iPad app is designed to fit that screen real estate and features of that device.<p>If Apple released their own open OS they wouldn't be able to develop in the way they do. Not that they would but hypothetically.<p>iMovie for iPad: Editing and viewing video is designed for their custom screen resolution and if Apple made a 16:9 device or allowed the OS to run on many devices they'd need to make a version which fits with many screen sizes meaning they'd skimp on UX and try and make a satisfactory experience on as many devices as possible.<p>Android devs will have to constantly think about 7", 10" and other sized tablets and if their app will work well on each. Other wise buttons, specific features and controls won't work well with smaller screens.<p>This won't kill but slow their inovation, Android needs more specs to be developed to how one of these apps should look and feel on multiple resolutions. "This is what an Android tablet app looks like".