You can use the menubar icon which is a really nice thing (it is actually the only thing you need, everything is in that menu).

If you hate the menubar icon you can hide it (option is in the vm settings). You can access the start menu from the dock icon if you want but you'll miss out on the other options (like the ones on the View menu). In Fusion this is done a lot better because you only need to look at the menubar icon. The problem I have is the unnecessary amount of modes (windowed, fullscreen, coherence/crystal is enough) and the fact that you have to look at 2 places for stuff: menubar and some folders/icons in the dock. That menubar icon is only used for the Crystal mode, it is useless for anything other. You have Coherence and Crystal which are like 99% the exact same thing with just the difference that with Crystal some stuff will end up in some menubar icon. The problem lies in how Parallels does Coherence and the many modes it has. Yes they have a smoother Coherence mode but VMware can fix this in Fusion updates. Imho the question should be: what reason do you have that requires the use of boot camp instead of virtualisation. It sort of defeats the purpose and ease of use of a Mac.

Other than that there is actually not much use for boot camp because it is annoying you need to shutdown everything, reboot and choose OS X if you want to use that. In such cases it is better to run the OS native by using boot camp. Virtualisation is limited to what it can do performance wise (especially 3d performance like gaming).

Very useful if you just want to run 1 application (like some vm management tool for VMware ESXi which only runs on Windows or Linux). Virtualisation products have a special mode where you can integrate Linux/Windows stuff with OS X so it looks as if that Windows application you need to run is a native OS X application. You can drag and drop between host (=your Mac) and guest OS (=vm) and simply put things on hold (aka suspend the vm) when you want. When using virtualisation you simply start (or resume) the vm with the OS you want to run. Boot camp is troublesome as you need to reboot when you want to run another operating system.

If you're asking that question you don't understand virtualisation.

Virtualbox mac g5