It's not bold at all, since there are lots of enterprise tablet deployments today and products in the market specifically to serve such uses: http://www.samsung.com/us/business/samsung-for-enterprise/in...

These are not all being deployed as "secondary devices" - in many cases companies deploy them because they're cheaper to deploy and maintain than a laptop, which only makes sense if you're not also providing a laptop to the user.

Having companies run solely on laptops or tablets has nothing to do with whether or not there are enterprise tablet deployments. Your logic is flawed.