A keyboardless tablet can work fine for...
- watching netflix
- playing games
- reading your favorite star's latest tweets
- reading e-mail
Yeah, that whole aforementioned 'consumption'. But these devices have long since moved beyond the toy status. The lines of definition for what people thought a computer is now blurred. And now people expect even an Android phone to be a productivity device. And for that, a keyboard is just so essential. Ye olde QWERTY keyboard may be purposely inefficient, but it is faster and more accurate than any on-screen keyboard or voice system. In my own experiments with trying to be productive with an iPad 2, Droid 4 and Acer Iconia W700...I absolutely needed a physical keyboard to type anything out without error.
As for Windows RT, Microsoft has spent too much money to let it natural fail. We will see RT languish on for years and years why Microsoft's profits prop it up. They will offer enough money to bribe devs to write apps for it to keep it going. With Outlook coming to RT 8.1, that will address the business side issues.