I have been watching the maemo 5 videos. What i found is that task switcher virtual button is placed on the left side upper corner of the screen. In comparision the same virtual button was placed in the left side lower corner of the screen on the previous tablets. Of course there was also a hardware button on the earlier devices. When i hold the device with both hands with the keyboard open, it is very ergonomic to press the task switcher virtual button when it is present in the lower left corner when compared to the same button bieng placed on the upper left corner.