My biggest gripe with Apple and Microsoft right now is the lack of progress bars throughout the OS. For example, when Windows 10 boots the first time it goes through all this "Let's get started..." "Just setting up a few things..." etc. But you literally have no idea how long it is going to be before you use the computer, and on a tablet device it can be quite some time. I feel like this is a huge UI miss. One step forward, two steps back.