For work purposes, it's nice to have semi-powerful computer that you can take with you and then work at home later if needed. Battery life and boot time aren't a huge issue to me, because my laptop goes from home to work, and maybe to coffee shops (that have outlets), where the computer will sit there for several hours as I work. In this respect, a 10 second boot time or 30 second boot time makes little difference to me. I put an SSD on my lenovo laptop, and the boot time is such that I'm basically logged into windows by the time I pull my power cord out of my backpack and plug it in. I also like laptops because I can work with MS office on it, which is something that I and my co-workers tend to use a lot. The keyboard quality is also helpful because, if you're going to be writing on the job for hours, keyboard quality is something that you you're going to pay attention to and appreciate in the end. Then there's things like bigger screen real estate, more USB and video inputs, etc. that make me more functional with a laptop in a work environment.
Hybrids are great little devices and have tremendous potential in portable computing, social networking on the fly, mobile gaming, email, etc., but I don't see them replacing laptops for work related purposes any time soon. I feel this article is looking at laptops from the wrong usage perspective.