A nose wipe panel is a soft fleece or chamois patch sewn onto the thumb of the glove, giving you a gentle surface to wipe your nose or face without scratching your skin. It sounds minor, but it's one of those features you don't appreciate until you're dealing with a cold-induced runny nose all day on the mountain.
If you ski or ride regularly in cold weather, this feature is absolutely worth having. Wiping your nose against standard glove shells or liner material can leave your skin raw and irritated after a full day. The soft panel solves that problem completely.
It's not essential for everyone, though. If you mostly ski in mild spring conditions, take short sessions, or prefer minimalist glove designs, you won't miss it. But for everyday resort skiers braving cold temps, it's a small detail that makes a surprisingly big difference in comfort.