In 1984, what is the significance of the wine which O'Brien serves Winston and Julia?

Whenandvisit 's apartment, Winston is astonished to discover how the Inner Party lives
and is taken aback by the pleasant smells of "good food and good tobacco." Unlike
Winston's dreary, dilapidated apartment at Victory Mansions, O'Brien's flat has unique,
expensive furniture in it, and he even has his own servant. Both Winston and Julia are also
amazed that O'Brien is able to turn off the telescreen in his apartment and are curious when
O'Brien pours them wine out of a decanter. Winston has never tasted wine before, but he has read
and dreamt about it. Winston compares wine to something from the romantic past and associates it
with the glass paperweight and Mr. Charrington's half-remembered rhymes. Unfortunately, Winston
is disappointed when he drinks the wine and can barely taste it because he is used to drinking
strong gin every day.

O'Brien's wine emphasizes the extreme gap between the
privileged Inner Party and the oppressed Outer Party. O'Brien's wine also...