The attached video shows what SUN OS R&D is thinking about.
Please note that this is not about OS war or comparing how great one OS over the other. Or whether one OS copied another.
Do note that this SUN OS experiment was done well before Mac OS X had its public beta and long before Microsoft “Longhorn” (aka. Windows Vista) was even a project.
My personal preference and computing tool of choice is Mac OS and had been for the past 21.5 years.