You're going to think my answer is bizarre, but those kind of underpowered devices would be ideal for office work or non-IT businesses in general. They need computers to do the same things as they needed 15 or 20 years ago. Writing documents, spreadsheets, taking inventory, sending and receiving e-mail.

No, your idea is perfectly rational. Somebody I know consulted me on what kind of computers to buy for their new small business that would only be used for browsing, email, word processing. I found them a store that sold used Dell and HP workstations. They got 3 Dell machines (CPU + Monitor + Keyboard + Mouse), all Intel Core i5 with 16 GB RAM, 1 TB HDD with Windows 7 Pro, for $75 / each. We spent an additional $25 to purchase a cheap 128 GB SSD and installed Linux (LMDE), Firefox, LibreOffice and GNU Cash on it. (Preserved Windows Dual boot option, just in case they needed Windows for something). This was 2+ years ago and the owner was so happy that I reduced his IT hardware budget by a quarter. I recently purchased a used HP 25" monitor from Craigslist, for $60, in excellent condition and still having a year warranty on it, whose retail price was around $500 on launch. There is so much e-waste being produced ...

> Writing documents, spreadsheets, taking inventory, sending and receiving e-mail.

Well... Outlook is already a web app, the rest of the Office suite will follow rather sooner than later, and inventory - it's either web apps or SAP, both memory hogs.