What you state is only true for real embedded devices. Yes, its more useful on a laptop, but that doesn't mean its useless on a tablet.

If one is running buggy software which drains the battery the user is going to be in disadvantage in several ways: 1) general decrease in performance 2) lower battery life. Suspend-To-RAM has nothing to do with that.

Some of the buggy software eating CPU resour ces is 1) part of maemo 2) may run only when the device is in use which is not 24/7 while putting the device on and off uses more resources.For example, many people won't need to have the NIT on while asleep, therefore it isn't necessary to have applications like applets or Modest using CPU resource. I'm certainly not using my NIT 24/7... besides that, some software isn't buggy; it simply uses quite some resources.