The right good quality wine glass can actually. Ill explain:
Taste and smell are linked. Try tasting something with your nose blocked and youll get my drift. A HUGE determining characteristic of wine is its nose. The right sized and shaped glass can ensure that as much of the wines "nose" as possible gets focused into your nose and thus enhances the taste of the wine.
The big end wine tasting and judging courses around will usually cover the glass before you even get near any wine.