Simplified OO WPS clone, no rendering engine as such but rendering offloaded to Vulcan, command line interface that is a hybrid of OS/2 CL and an interactive REXX interpreter, that would use Oberon style (much simpler) OO features glued onto REXX rather than the Smalltalk OO features that Objective REXX uses, but also offer AOS style "text interface inside a windowing environment" as an alternative for the CLI challenged. This could make the WPS feature of making everything an object pay dividends in making everything scriptable as well.
Merge the WPS "work folder" feature with the multiple desktop feature of eWPS to create a tabbed work folder that can also function as a separate virtual screen, and thus allows you to arrange your work into folder-tabs that each offers either a folder view or a desktop view or both.
Ditch the drive letter metaphor for an OO interface that works with NVMHCIS or similar, offer a plugin architecture that emulates drive letters for legacy software. Drive letters made sense in the 1970's, in 2017+ we should be using WPS objects with automatic configuration and management of storage, both local and networked.
Browser should be integrated into the WPS much like Web Explorer partly was, only more so. Some DOS compatibility on some level would be nice as well.
I would buy this ... either as software or hardware ... proprietary or not.