I have been happy with "multitasking" in SGS3, for 5 months now.

For example, yesterday I was listening FM radio, while surfing the net with Firefox, playing games (TinyVillage, ModernWar), browsing photos. Also I had sshd running in the background all the time. It just works. I know most of the apps are not running in the background, but I do not care as long the system is highly responsive and I can continue where I left the application last time.

When something really needs to be run in the background, forcing to have a special service thread/process makes sure the developers do not put any battery or RAM wasting code there.

The "real multitasking" makes mobile systems unresponsive sooner or later. Those systems are not suitable for "normal people" and therefore cannot succeed in the ecosystem war.