Melvin, you are thinking about the Me262, the 163 was the rocket interceptor.
The problem with many of the 'wonder weapons' was that Germany lacked most of the critical natural resources necessary to mass-produce them. The Jumo004 engines for the Me262 (and Arado 234 bomber, for that matter) suffered from serious defects due in part to a lack of tungsten and tantalum for turbine blades, while the rocket programs all suffered from shortages of exotic minerals for various steels. Even simple weapons such as squeeze-bore AT guns (which would have substantially improved German AT capability with almost no extra development) were crippled by a lack of tungsten for shot.
The German weapons development programs were also hampered by their incredible duplication and inefficiency, something it seems that only the US could truly afford. The cost of building even a few of these weapons was astronomical (a single V-2, which could deliver a single ton of low-explosive inaccurately cost the same amount as a Ju-88, one of the better German aircraft in the war), and tended to usurp personnel, resources, and attention from other, more practical projects...
If the the Germans had gotten more of their wonder weapons into production earlier, the war might have been much shorter...
I am reminded of a story by Arthur Clarke called "Superiority", do you know it?