Simple question: Mutual or two way certificate authentication

[yushaUzumo]

Is mutual or two way certificate authentication like the one used in soap web-services going to be added to REST and made one of the security standards across all modern programming languages, in particular in restivus? I feel basic authentication even when used with tokens is not as secure as mutual or two way certificate authentication that we have in soap web-services.

In my case I am looking to call the REST api both from the browser client and non-browser client that will do a lot of processing (millions of POSTs in a single thread) and another non-browser client that will do millions of GETs in a single thread.
Is mutual or two way certificate authentication in the pipeline at least in restivus?