Are you sure? Is it not at least as likely that people already have perfectly functional computers, but are replacing them far less often because there's no real need?
Many are choosing not to replace a PC with a PC, but with a tablet or even just using a smartphone.
When I see tablets used as cameras I do see the annoying physical space they take up, but I also see the market space they embody (the whole mindshare thing). Camera sales are stalling because of this, certainly at the low end, but it will creep up.
Camera makers are still locked into the mindset that users will take a physical card out of a dedicated camera, put it in a PC, edit, organize, and share. The use of a digital camera depends largely on a PC.
No longer. Consumers are using non-PC interfaces, which means tablets and smartphones. The camera makers see the PC as an accessory to the camera. In fact, it's now the reverse. The tablet or iPhone is rapidly seeing the camera as the accessory to the network. The major camera brands have done almost nothing to interface with this new technology.
Why shouldn't consumers use a tablet? It takes the photo (quality is subjective even here on RFF), allows for quick and easy previewing, can edit, organize, and share, all in one, with a huge variety of options for editing, networking, archiving, and professional apps.
The inability of the camera makers to make it easy to interface (SD/CF card reliance) is leading to people leaving the camera at home and just getting by with the tablet camera. There's too much networking and personal use friction to getting a photo from a dedicated camera into the main consumer interface device.
You're going to see a lot more of this, etiquette be darned.