I use Sarien for Police Quest. It was easy to set up (On OS X at least. Just double-click the file.) and works great. Makes it look like a CGI version (Even if you originally had a Mac version or EGA version.) but works great.
I think it's great all the old games are still getting attention.
With DOOM Legacy, I can play all my DOOM games on a modern OS X (And not in Classic) with great improvements.
With Zoom I can play Zork, Hitch Hiker's Guide, etc..
It's great. Can't forget the old classics simply because your computer's OS can't run them anymore.