I have to disagree with your analysis. Phone and tablet is more of a consumption device or a multi-media menu system, but it is not going to displace the computer - just give more options (computer is more of a work instrument - i.e. creation rather than consumption). The reduction of prices since I started using personal computers (my first one bought by my father was an IBM PC DOS 1.1 machine for $6,400 which included a 20% discount (2 floppy drive, electrohome cga monitor and a crappy dot matrix). Now with the lower prices, I have an iphone, tablet, and personal computer all for a fraction of the price. Each serves a purpose. I don't really want a device to try to be all things to all people and do nothing great. I do want my devices to work together seamlessly (cloud is the first step). I find a tablet works great for reading, some browsing and watching videos and maybe menu entry -- but it would kill me to have to sit in front of one trying work with it. I sit far enough away from the computer that having a touch interface is a hassle. You can make an operating system that is the same for all devices (if they are powerful enough) but the user interfaces should not all be the same since you don't use them all the same way. That is why Microsoft has had such problems with adoption with Windows 8. If I want lots of functionality and a large screen - I will use my computer -- not a tablet.