Historically Speaking
In the early days of the computer industry, I sold computers that were pretty much an island unto themselves. Single machines, and in an office setting you might network them together (of course networking meant crawling a wire through the drop ceiling, and soldering the ends together - not to mention buying the networking hardware and paying the services to install and configure it). The network was to share printers, and maybe a file server to share files within the office, there was no such thing as inter-office network. So you had this drive on which you saved the file, and you could open it on another computer. File locking ensured that only one person opened it at a time.
Over the years, as computers became more and more connected, we have evolved to what is now called "Cloud" storage. Personally I think that is a funny marketing-heavy term for some hard drives on the Internet. But be that as it may, Secure Common Storage seems to be the way things have been going. Microsoft has even made quite a product out of SharePoint, and migrated Office to online service-based; Amazon introduced S3; Google had Docs, and now Drive; and so on. Apple iCloud offers Internet-based backup and synch services. And the Paprika recipe app offers synch of your app data (incidentally not using iCloud, but their own storage).
So notice that the Apple and Paprika data, for example, are locally stored. The way iCloud works is you have a local store on your device (desktop, laptop, tablet, phone or iPod), and the Cloud part keeps them in synch by synchronizing updates between the Cloud storage and the device. This means that if you are disconnected, you still have access to your files (that you have synched). In contrast, things like Drive and S3 are live online, so you don't have access to them unless you are online.What do "They" say?
Having walked through that progression of thought, it seems very logical and obvious that, in a mobile world, what Christine said has to be true. But it struck me as strange, because that doesn't seem to be the consensus of "they." That is to say, all the tech blogs we frequent, IT professionals that we talk with, and magazines, news, and other sources seem to be stressing the Cloud. Basically in Paprika's instance, the data is yours, and it resides primarily on your hardware; the Cloud is used to keep multiple devices in synch. This is quite different from the Google Drive paradigm. For example, I created a spreadsheet on Drive called Workout. I edit my workout routine from my laptop. While at the gym, I open it on my Phone, and see what the next machine, weight & seat settings are. I update the weight target as my muscles progress. When I get back to my laptop, I can open it up and see it again. The primary storage is in the "cloud" - meaning on a hard drive array in Google's office somewhere connected via Internet.So in my experience, "they" have missed this key direction the industry seems to be going in - or at the very least, haven't caught on to the full meaning. First of all, who has used Google Docs extensively? Other than the cool ability to instantly share and collaborate on a document, let's face it, the abilities of the word processor and spreadsheet, frankly, suck eggs. And they are a whole lot worse on the mobile device (e.g. iPhone or iPad). The formulas don't even update!
Christine I think has hit it right. Local apps with synched data. Perhaps the ability like Amazon Kindle app, to remove local copy to free up local storage, and download it again later is the way to go. As we design apps (and indicate to developers our desires as consumers and focus groups), we can stress both the connectedness, and the ability to operate disconnected, as well as the choice to what to carry with us.