I think what limits the tablet/IPad market today is the state of computer/human interaction. With typing still the dominate means of human/computer interaction

I think what limits the tablet/IPad market today is the state of computer/human interaction. With typing still the dominate means of human/computer interaction, tablets/IPad don’t stand a chance. For tablets/IPad to become the dominant form, human/computer interaction would have to move beyond typing (directing computers with our minds). But by the time this happens computers are likely to be implanted in humans so one would not need some external device to interact with. Perhaps they will be a bridge technology if there is some time between mind control of computers and computers being implanted into humans.