Most likely someone at DEC foresaw that the rise of
the killer
 micros
 was going to be as bad as it was, and managed to convince a few
 people
 that IBM PC-compatibles and their consumer OSes were the future
 for all.
 I seriously hope that this is not true, and that nobody foresaw
 computing as it exists today. 
 Yeah,  what a horrible world we live in --
affordable, powerful
 hardware capable of running a wide variety of free, powerful, and
 useful operating systems and software and emulating every vintage
 system under the sun.  A world -wide-network making the collecting
 and maintainance of our hobby projects possible.  Digital watches. 
 
 The world we live in today *is* great.  But it wouldn't be great
 without all the invisible *large* **powerful** machines running off
 in the background somewhere doing a lot of heavy lifting.
 It's the people who predicted everything would be obsolete except
 the PC were *wrong*.