People have inquired in the past about giving calibre a facelift, I think we can all agree it doesn't meet the Apple guidelines
but so far no one has volunteered to do the work.
Eye candy doesn't grow on trees, and Kovid's time has already been allocated to maintaining and expanding the
featureset.
I for one would much rather we get a new Content Server with read-write access, an in-browser reader app that supports annotations, and which integrates well into systemd -- rather than eye candy which doesn't make calibre any more useful.