Up until now software architects were doing two jobs under the same title: mature software engineer and mature software designer. [Note that the word 'mature' is used over 'senior' since age does not equate to seniority or ability to design complex solutions.] The software architecture discipline will eventually split into those who concentrate on the art of the discipline and those who specialize in the science of the discipline. This is inevitable due to the ever-growing complexity of responsibilities a person with a software architect title.
All software architects need to have experience from the trenches (working on serious projects in the real world) doing programming, design, and experience in all other parts of the SDLC experience. However, the architects concentrating on the 'art' aspects of the discipline will find themselves spending more time understanding and eliciting the business problem and conceptualizing the solution. The architects concentrating on the 'science' aspects of the discipline will provide cross-check the concept and provide insight on concrete implementation options. The soft side of the architecture discipline will deal with the human aspects, while the hard side of the architecture will address technical aspects.
The need for further concentration by means of splitting architecture responsibilities into soft and hard sides comes from increased demand from the business users to develop solution that solve a business problem, as well as the need to deal with the continuously growing complexity of implementations and overflow of new technologies and tools.