Actually, it is. What makes for a real Personal Computer experience? Not the processing power. My old laptop with Intel 80486, 4MB RAM and a 800x480 screen is a PC. No, what makes for a PC experience is... the experience! Having a hardware keyboard, however lousy, brings the device MUCH closer to the real PC experience than quadrupling the CPU, RAM and screen size put together.
Actually, it does. Yet again, it is about the experience. A stylus is all about precision. Not only is it MUCH closer to the real thing (a mouse), but also it allows you to do things you could only dream about on a toy but that are considered essential on a PC. Such as picture, video or audio editing or desktop publishing.