Even with all that Apple has going for them, Tim Cook and the folks in the company should probably be a bit more concerned. iPhone 4 Leather Case are coming fast and in tidal waves, and they do have some advantages that may make them viable iPad alternatives.
First, many of the iPhone 4 Hard Cases can be purchased and used several different wireless companies' networks, giving them a wider exposure. Many people are going to want to get a tablet at the same place they have a phone, and since the Ultra Thin iphone 4 Cases is only available at AT&T (and now Verizon, although you have to carry around a hotspot to use it), this could mean a boon of sales for items such as the Samsung Galaxy Tab, available on several carriers.
Second, while it is true that many iphone 4 silicone case are running a smartphone operating system, that will change soon, as many of the best Android tablets coming out soon run on Honeycomb, or Android 3.0, which is optimized for tablets.
Finally, there is a lot of variety in what is offered among Soft iPhone 4 Case alternatives, and some people will find that options such as having a smaller device than the iphone 4 Plastic case, such as the Samsung Galaxy Tab, which is about 7 inches by 4 inches, will be better for them and easy to carry.
