The real power of sBTC will come from developers building applications that utilize it. These guides will show you how to utilize sBTC in your applications.
Big caveat for the developer tutorials: These tutorials utilized libraries that used the previous OP_RETURN system. sBTC is being redesigned to utilize only OP_DROP, so these libraries will change. You can view the tutorials as a way to familiarize yourself with how you might build on sBTC, but know that this will change.