That's something, right? Personally, I'm not sure what to think.
I think the big question on everyone's mind is, "Now what?" Will Twilight turn back into a unicorn in season 4? Will the mane 6 continue to study the magic of friendship? Roughly how jelly do you think Trixie is right now?
Some people have suggested that the last line of the episode, "Everything is going to be just fine!", could be a message to the fans of the show that everything will work out eventually, possibly indicating that things will return to normal. Or, the line could be foreshadowing that the opposite is true. Perhaps Twilight being an alicorn will become a problem.
Anyway, what do you guys think?