@tsarstepan,
For daily web browsing and basic Emailing, I prefer virtual keyboards to physical keyboards. Basically this is because I prefer devices with no moving parts to break and no crevices for stuff to fall into. Also, virtual keyboards can be resized and reshaped per the users desires (if the software allows it).
When I really need to crank out lots of words, then I definitely prefer a physical keyboard so I can touchtype at full speed. But most of my computer use doesn't require that much typing, so the virtual keyboard is preferable in many cases.
If Google produces this device, I hope they do it on a Linux Kernel, not a MicroSoft base. It should be much faster and more stable on Linux.