Replacevalue after comparing date type collumn value with current date

Good afternoone everyone 

Me (a noobie to PowerBI) would like to add a powerquery step to the following example data:

if the "Geldig tm" column has a date that is in the past I'd like the "Resultaatteken value to be V.  as such (with the help of these forums!) I wrote the following code:

= Table.ReplaceValue(PrevStep, each [Resultaatteken] , each if DateTime.LocalNow > [Geldig tm] then "V" else [Resultaatteken],Replacer.ReplaceValue,{"Resultaatteken"})

Unfortunately this is not giving me the desired result, at which time I decided I'd like to see what the value of DateTime.LocalNow is (Suspecting it is some form of display or Date & datetime shennanigans) so I copied the Resultaatteken column to Resultaattekenz and ran: 

= Table.ReplaceValue(#"Volgorde van kolommen gewijzigd1", each [Resultaattekenz], DateTime.LocalNow ,Replacer.ReplaceValue,{ "Resultaattekenz"})

which doesn't change the value at all, however when I replace DateTime.LocalNow in the second query with a string literal "Why" then it changes the values of the collumn as I expected.. So as far as I can tell DateTime.LocalNow appears empty. 

Long story short(er) I was hoping to find some wisdom on this forum;

1. How do I compare todays date to a date value (date type) during Table.ReplaceValue
2. How can I view the output of a function. (I suspect the whole copying of a collumn and printing it on every row isn't exactly the way to go).

Thank you in advance for any and all help given!