At the time of OS/2, it really was the best operating system available for PCs. Well written, fast operation, superior UI and great security. I'm definitely biased because of the involvement I had in its design and early integration, but it was an excellent platform.
I just don't see how bringing it back now, after so many years of being ignored, it can be brought up to speed in terms of features and hardware advances. It's limited to 32bit processors and I don't see any mention of handling multiple cores not to mention GPUs, USB 3.0, etc.