And you can continue to work that way if you so prefer...
The whole beauty of Windows 8 is that you can use it however you want... consumer mode, professional mode, or hybrid.
I'm attaching a screenshot of my desktop and start screen so you can see that I don't have any Metro-style apps in play on my laptop. The only time I even see the start screen is if I want quick access to my admin tools (right) or if I reboot and need to logon again.
One last thing... I'm running a Dell Vostro V131 laptop. On Windows 7, I would get about 4-5 hours of active-use battery life. On Windows 8, I get about 9 hours. Not saying that's the experience on every system, but the performance optimizations alone make it worth it.