Most importantly, Android is business-friendly. You write an application and you use it, guaranteed. Not so with Apple - it will be examined by Apple, and Apple will decide if you are worthy of using it. It may be that your app that you need for your business is clunky, large and breaks Apple experience - you don't care, it's to monitor tire pressure in trucks, for example - but Apple does care, and the app will be axed unless your business pours more money and time into making it "right."
There are many potential uses of phones and tablets in businesses. Tablets, IMO, are best specifically for businesses and not for individuals at home. But Apple doesn't even have any process under which a business would be in control of its software. Android has that. So Android will be the winner on the business side. iPhone may or may not keep its lead on the consumer side, but I personally don't lose any sleep over it - I write only industrial software, and Android creates job opportunities where Apple is not even a player. And you are wrong... many businesses have written specific business only apps that are intrinsic to a single business... and Apple allows this. You just don't know about it... so you claim it doesn't exist. Just because YOU don't know about it, doesn't mean it is not existent. There are reasons why many enterprise businesses are embracing the iPhone and now the iPad.
many businesses have written specific business only apps that are intrinsic to a single business... and Apple allows this. Indeed, I'm not aware of any official way to bypass Apple store for deployment of my application on tens (or hundreds) of specific iPhones that the company owns. It is essential to be able to deploy directly because often there are urgent changes. Another reason is that you don't want any review of your app, by Apple or by anyone else outside of your company. Yet another reason is that you want to limit distribution of your software to only your devices, not to the whole planet. And finally this should be done automatically, from your office - not by asking hundreds of workers to do some complex procedure. I haven't heard or read anywhere about anything like that for iPhones (and this is standard in companies.)