PowerShell, along with a number of console environments, have the ability to tab thru some options, usually files and directories. Unfortunately, this doesn’t support enough, if you ask me. Even if it did support more, it doesn’t compare to true IntelliSense. I know this isn’t quite a feature of the standard console app, but to have the Visual Studio style IntelliSense would definitely make it easier to learn and work with PowerShell.
This is one of my big complaints about PowerShell: load times can be slow. I’m not sure why it’s so slow, but it needs to be as fast to load as the regular command line. I posted a question about this internally, but I haven't been too impressed with the response times on getting answers from them. We'll have to see.