Business will use private cloud, definitely not iCloud
Unless you are editting videos/audios, 1MB/s and 1GB/s doesn't make any difference when you are just editing a document
iPad in business is not about replacing laptops. It's about using it when convenient and appropriate
I'm not going to download my own documents just to be able to use them. The very idea of it is absurd given how cheap storage has become.
I really wonder how much these proponents of iCloud actually use files? One can email and surf the internet all day long without having to deal with more than a handful of files. There's nothing wrong with using a computer in such a way - it's how most people do use them - but at least in the past Apple focused on creative users who use their computers to create stuff which generally leads to creating files. Lots of them.
Apple's iTunes/iCloud based management of files on iDevices is perfect if all you do is buy content from Apple. Try doing anything else and file management falls down.