Windows 8's split/shared screen feature.
Make it compatible with Windows 8's split/shared screen feature.
So I can do work or watch a movie while replying/viewing to msgs.
I think you mean make a windows 8 app?
There is a suggestion here: http://help.mightytext.net/forums/123495-general/suggestions/3575717-windows-8-app with 145 votes already.