I use a HP Touchsmart Convertible (WIN7) and I am quite happy with it. It is the consumer version of convertible notebooks, so it was affordable (half the price of a "professional" one).
Yes it is a compromise and I really like to use the USB-Docking, big screen, a good external keyboard and mouse in my office. But I even do protocols during meetings with the built-in keyboard - it is fast enough for my "homebrew, 6-finger-typing".
It works even as a replacement for light control, remote control software for wireless microphone rack or jingle-machine control for smaller applications.
In opposite to "each application a specialized device", I do not need to choose what device I have.
Smartphone and this convertible does it for my purposes.
For extensive use of Cloud services (to have all my data available on several devices), I have to rely on wireless Internet (be it Wireless LAN available or any cellular based system).
To explain: I am in Germany close to the swiss border. And here, we do NOT have a tight network of public WLan available and in some parts of black forest, I am happy to send a short text message - for extensive data transmission, the network is too slow. And when I pass over to Switzerland, I need a Swiss phone card to use wireless cellular based networking or I get a poor man quite easily.
So to have current project data on me and a big (protected) archive at home is my solution. And this convertible really increased my possibilities!