Uther is definitely going to age as the years go on. I really enjoy seeing characters' appearance change over time.
I played WoW for eight years, and at the time I wasn't a roleplayer, but my friends and I had enough respect for story and realism that we each had our own back stories and we aged our characters appropriately. It was really cool to see my troll friend, who started the game on day 1 of Vanilla with a full head of wild green hair, retire right before MoP with male pattern baldness and gray hair. I couldn't age my horde character, who was a walking corpse, but I did age my dwarf from mid-length bright red beard (Vanilla - WotLK), to long dark red beard (Cata), to gray beard. (MoP)
I played WoW for eight years, and at the time I wasn't a roleplayer, but my friends and I had enough respect for story and realism that we each had our own back stories and we aged our characters appropriately. It was really cool to see my troll friend, who started the game on day 1 of Vanilla with a full head of wild green hair, retire right before MoP with male pattern baldness and gray hair. I couldn't age my horde character, who was a walking corpse, but I did age my dwarf from mid-length bright red beard (Vanilla - WotLK), to long dark red beard (Cata), to gray beard. (MoP)