Your query is clear to me now.
Unfortunately I can't create a pop up with all results. (we are talking about lots of rows, right?)
Unless someone else provides a solution I can give you 2 options.
1. Create a pop up for every single entry. This means in your last example you would get 2 pop ups. This could get annoying when you have to click away i.e. 10 pop ups.
2. Create a hidden sheet which only appears when file is opened and when there is something due tomorrow. This sheet could contain a button to confirm the list (same as OK button on a pop up message) and hide the sheet again.
A temporary overview sheet has more customization / formatting options then a pop up message.
Let me know what you want. And please let your thoughts loose so we can find maybe a different solution.