The subject of this topic has little potential to spark discussion between many members and, as such, would be better suited to a status update or a blog. When creating a thread, please remember that the goal is to start a conversation with room for many people to chime in and give their own viewpoints on, and that sharing events of an anecdotal nature would be better done elsewhere.
Threads that pertain to media, such as E3, are located in Media Discussion. If you can't find the thread you're looking for, then you can either make the topic yourself or wait for it to be made. If you want to know if a topic exists and don't want to make one, then you could try asking with a status update if anyone has seen a thread on that topic, or [see below] but don't make a thread about it please (removed, SCS answered that way better). Here is the thread you were looking for: http://mlpforums.com/topic/100744-e3-thread/
LowfatEnvelope's post in Where's the E3 2014 Discussion thread? was marked as the answer