You'll find below my ultimate OS feature wishlist. This is from years of use of Windows and Mac OS, as well as some Linux use. Now, I know, some of these may be covered by one or more of the countless Linux distros out there, however, Linux isn't ready for my desktop (whether it's ready for the desktop is a matter for people smarter than I).
The ultimate operating system would feature:
• A completely vector-based UI with full transparency, allowing users to select not only a monitor resolution, but also a display DPI, so that large, high-density displays could be used to display the same size features at higher quality.
• An auto-update system that's open to all developers to use. Currently, modern OS's (Mac OS and Windows) supply a system auto-update feature that cannot be used by installed applications, forcing application developers to write their own, separate auto-update libraries.
• A bug/crash reporting system that's open to all developers to use. We sort of have this now, but it could get a whole lot better.
• A complete skinning/theming system that can be used to apply complete OS-wide interface makeovers, as well as skinning specific applications. Currently, operating systems typically require a seperate piece of software to skin the OS, and many individual applications provide a means to skin that application.
• Filesystem-level local revision control, and integrated access to remote revision control repositories. Revision control isn't just for programmers any more.
• A tightly-integrated, professional-quality Personal Information Manager (PIM), integrated into the system's clipboard and drag-and-drop functionality. Apple almost has the right idea here, except that the PIM applications themselves are dreck. It should be simple to use my computer, without any 3rd-party software, to store contacts, set reminders and appointments, create a to-do list, and so forth.
• Multiple clipboards and clipboard history.
• Solid remote command-line and remote desktop capabilities. Only *nix really has this nailed down. I want to be able to throw away my KVM in favor of my LAN.
• System self-optimization based on usage statistics. C'mon, guys, this can't be that hard. I shouldn't have to do much, if any, of my own optimization; operating systems should be smart enough to monitor how I use my PC and adjust system settings accordingly.
• Window-manager-level support for tabbed interfaces. It should be up to the user, not the developers, what windows and applications can be run in tabs rather than a slew of individual windows.
• A decent application launcher. Seriously, this is the core functionality of all operating systems - running applications. But still, with every OS I've ever used, I've had to install a 3rd-party application launcher to really get the most out of my system. I should have a customizable solution that completely eliminates the need for programs like QuickSilver, Colibri, Katapult, DragThing, and so on.
• Easy management of startup items. For crying out loud, this is still a pain in the ass on both Windows and Mac OS. Why?!?
• A cappuccino maker.
So, what's your OS wishlist? Post in the comments!