Those games were amazing when we were playing them on my cousin's PC, circa 1989-1990. Amiga/PC games were particularly impressive to me, since we only had NES (I later bought a C64, though). Alas, Willy Beamish got hit by nostalgia lucidity as I recently watched its playthrough. The idea was great, but the execution was pretty broken. People expected to play through the life of a mischievous school boy. What they really got was fairly unforgiving gameplay and the jokes were kind of unfitting. I mean, "Horny" the frog? Japanese family as ninjas?
Don't remember if my cousin ever managed to finish the game, but boy did he try.
I played Police Quest rather intermittently. Never remember finishing one, though. I think I played the part where the protagonist was switched from Sonny Bonds to John Carey for the longest. It seemed grittier than the previous parts. The graphics got darker and a dead kid is found on a dumpster in the beginning.
I'm afraid time has run over them too much to really be resurrected as "full blown" games. And wasn't Police Quest "turned" into the SWAT series (never made much sense to me)? However, since they recently resurrected Leisure Suit Larry, I can imagine Willy Beamish being re-released as downloadable phone game or something like that.