Consumer vs Business
To actually address the questions raised at the end of the article:
Businesses don't (shouldn't) use consumer-grade equipment due primarily to scale. You load 20 work laptops (or more) onto your "cheaper" AirPort or Netgear/etc WiFi device and you'll be locking up, dropping, rebooting it frequently at best.
Google Docs or Apple iCloud would work well for documents and such, but I don't know many workplaces that are willing to toss their accountant's spreadsheets and ledgers out into the ether, let alone their HR documents. Does Google store their project code in Google Docs? Nope (at least not the public one). If you use the consumer versions of "cloudy" file sync, it's usually a single external USB drive attached to your WiFi device or (if you're lucky) something you can install on a home server. Most companies have a hard time just scattering their potentially-sensitive documents into the wind though. Use this in a healthcare environment and you'll be sued at best.
If you want to go further into storage servers (a whitebox FreeNAS vs a VNX or the like), there's pros and cons, but you can't convince me a bank would host their infrastructure on your whitebox FreeNAS. Sure, it's loads cheaper than their Ipsilon or Hitachi VSP, but I doubt that would persuade them. You could try selling Macbook Airs to a MAS90 shop too. Just because it works at home for Facebook and iTunes, doesn't mean it has business-class features.