In a matrix entry part with a precision restriction, should pre-filled cells be rounded to that precision?

[christianp]

e.g. if you ask for a matrix with values rounded to one decimal place, and pre-fill one of the cells with a value sqrt(2), should it be displayed as 1.4? At the moment, it's displayed as 1.4142135624 unless you use something like precround or dpformat to explicitly round it off.

I think the answer is yes, but I want to think a little bit more about situations where you wouldn't want that to happen.