Capitalize first letter of sentence with autoref

For instance, given

\section{bla}\label{sec:bla}
...

\autoref{sec:bla} is where we discussed bla.

We'll obtain something along the lines of

2.1 bla

...

section 2.1 is where we discussed bla.

It would be useful to have something like \Cref from the cleveref package to indicate something is at the start of a sentence. I currently use something along these lines:

\newcommand{\Autoref}[1]{%
  \begingroup%
  \def\chapterautorefname{Chapter}%
  \def\sectionautorefname{Section}%
  \def\subsectionautorefname{Subsection}%
  \autoref{#1}%
  \endgroup%
}

Start by tracing hyperref's \autoref behavior and the \Autoref example shown in the issue, then compare the requested sentence-initial capitalization with cleveref's \Cref. Done means the behavior and command interface are defined and the resulting reference text is capitalized appropriately at sentence starts.