Someone with 'space on a desk for an apple product' is not really a 'computer enthusiast' just like someone with a mobile phone is not a 'radio amateur'. Yes, the phone contains an advanced radio system, enabling the user to communicate with whomever they want at the flick of a finger. In contrast to a radio amateur the user usually does not know how the thing works other than which buttons to press. The apple user usually knows which buttons to press but show them the nitty-gritty details of how that button press is translated into action on the hardware and their eyes glaze over. A serious computer enthusiast is better off with that wall of hardware, better off with Linux or *BSD than with a closed system, if it is OSX they want to run they're better of with a hackintosh.
Most of the programmers I know use MacBook Pros. Some have hackintosh desktops as a backup, but concede that the hackintosh setups are a pain in the ass compared to an actual Mac. So I'm not sure where you're getting that last part.
Personally, no. I would computer enthusiast requires either building your own computer or having old computers around. This is needlessly pedanic, but it's perfectly fine to be a programming enthusiast.
For instance, my grandpa had a ton of computers from the vic 20 to the IBM PC
