Would be quite hard to implement on the open hardware of the PC platform but I always thought SysInfo was an excellent program to compare yourself to your friends and bully them how much faster your A1200 with 030 is faster than there A500 :-D although it was never a part of the Amiga bundle.
I also think that the built-in PCMCIA slot was a risk at the time but has paid off alot now with users using them to network and so on... the slow RAM idea was good in theory but doesn't hold up today (unfortunately MS still seem to think excessive VM is a lifesaver)
One thing that Amiga got wRONG in my opinion is the media. They stuck with DD long after HD disks were the main media in the market. If they released the A1200 with a HD disk drive and put the software on HD disks then it would have made a big difference in the amount of disk swapping and so on (less disks) and also they should have released the A4000 with optional CD-ROM drive and the A1200 CD add-on, nevermind :-(
OK, back to the positive stuff. I think another great thing about the Amiga was the OS in general - it was slim, light, fast, something that Windows will NEVER be because MS's whole ethos on developing is completely wrong. Bloated software then wait for hardware to catch up (repeat until infinity) :-P
And I've said it before and I'll say it again, the wedge design is awesome 8-)
