IA great deal of people have ditched their laptop/netbook for a tablet. iPad/Android. That's a fact, you can look at the market, you can see what people are buying and not buying. The iPad/Android tablets are being used by MANY as replacements and doing real work already. You're trying to make it happen when it is already being done. iOS on the iPhone vs iPad is pretty much the same, only thing that has changed is form factor. No one is going to deny it is harder doing things on a smaller form factor. My iPhone is coming VERY close to replacing my Samsung Q1U UMPC.
I told you I was just joking around with you - but if you want to get serious, if your a technical director of a telecommunications company, you code, and you are in a board meeting shouldn't you of had a laptop with you? Your example was valid, I will give you that, but it is the kind of example where you have to say, "wait a second!" the same way you do when you ask a gun nut, "Why do you need so many AK-47s?" and then he shows you how to light a cigarette off of one and then he gives you many other reasons that are pretty implausible.