I have mine go to sleep AND lock the computer after two minutes. If I'm away from my desk, I don't want someone coming in and messing with my files or computer. Yes, I have to press Ctrl-Alt-Del then type my password, but the safety is worth it.
If Philips wanted to do something REALLY amazing, it would "know" when you've left, lock up, shut off the display, and not come back on until it "knows" you're back. In other words, it would eliminate that logging-in time. THAT would be worth a few extra bucks.