I think AROS stands the better chance of survival what with it being Open Source and running on a lot of commodity PCs. The 68K port sound interesting. I still have my old A1200 though it hasn't been used in years. I've downloaded and had a quick look at AROS on x86 using VirtualBox and it seems at first glance to be very good.
I've never used OS4 or MorphOS. Both of them look fantastic but I cant help but feel that PowerPC is a dead end. The hardware is just too expensive for OS4. I like the fact that MorphOS can work on an old PowerPC Mac but I feel this is too limited for them. New inexpensive hardware is what is required along with a good base of software. The lack of software is the real killer of each of the OSes in my humble opinion.
