Maybe in a parallel universe in which Sony don't encumber it with crippling amounts of DRM, rendering it too useless to the modern consumer to compete. After all, people are still using MP3 (an outdated compression method), mostly because anyone can implement a MP3 player without being legally required to commit to implement draconian DRM restrictions which limit its usefulness to the user.
I agree with you on the DRM issues, but in theory shouldn't all SACDs play in normal CD players too (albeit at standard 16bit 44.1kHz quality therefore buying you no added benefit over a normal CDr).
Oh, and the fact that these are still not readily available four years later is another clue that market saturation is unlikely.
Sorry bud, but DSD is the way of the future. 1-bit 2.8mhz or 5.6mhz recording is massively superior to the outdated PCM waveform and won't take very long at all to catch on once a level of market saturation is reached.