For all the flack The Big Bang Theory gets for its stale construction of episodes (certain characters always being pathetic, Sheldon going out of control etc), at least there is some character development. It's not the priority of the show or probably even the fifth, but it's there and the writers made sure to sneak it in to quite a few episodes this season.
Ultimately, Penny with get back with Leonard (and if they don't, it'll be really stupid), and we're starting to see more and more signs. Aside from the fact that Leonard to a loser who likes Priya because she's hot, Priya is losing interest in Leonard, not knowing about his games and talking to her ex-boyfriend. And Penny is still reliable, helping Sheldon get his game items back. (On that note, how exactly did Sheldon lose the items if most high-level items in WOW are soulbound? Surely he should have gotten his account back after contcting Blizzard.)
The rest of the episode is standard stuff, Sheldon freaking out about the loss of seemingly trivial online goods and the girls teaming against Priya.