Microsoft has made steady improvements to Word, Excel and PowerPoint in its new version of Office. But I don't believe people are going to rush out and upgrade as soon as possible because of its high price.
Today, there are plenty of free Office-like application alternatives like Open Office and ThinkFree Office Online. You can get away with using any one of them to create, edit or view these basic formats.
Generally we use only 25% feautures of the Office package. So its up to you only that after its release and after its review by me( which will be soon after its release), you will buy it or not!