I'm not the reddit poster. And I'm not sure if this is true or not. But here you go.
http://www.reddit.com/r/elderscrollsonline/comments/1zyj3e/zenimax_customer_support_confirms_that_a_preorder/
I'm not the reddit poster. And I'm not sure if this is true or not. But here you go.
http://www.reddit.com/r/elderscrollsonline/comments/1zyj3e/zenimax_customer_support_confirms_that_a_preorder/
Quote from the official site;
Starting April 4th, 2014 all customers who purchased the Digital Standard Edition can upgrade to the Digital Imperial Edition by visiting The Elder Scrolls Online Store (https://store.elderscrollsonline.com). This will allow them to receive the exclusive collection of in-game rewards available from the Digital Imperial Edition. This upgrade service will be available from April 4th, 2014. If players have purchased a physical copy of the Standard Edition but wish to upgrade to the Digital Imperial Edition, our upgrade service is also there to assist them.
So, i suppose one sentence is missing from this answer, that is quite typical for an MMO in this stage:
"This game is still in development so everything may be subject to change"
I expect that at least the imperial race and the mount will be available at some point in some form for all players. Titles or pets maybe not.
I don't think that you can read more out of this statement at this time.
https://help.elderscrollsonline.com/app/answers/detail/a_id/4729/kw/imperial%20edition
Starting April 4th, 2014 all customers who pre-purchased the Digital Standard Edition can upgrade to the Digital Imperial Edition by visiting The Elder Scrolls Online Store (https://store.elderscrollsonline.com). This will allow them to receive the exclusive collection of in-game rewards available from the Digital Imperial Edition. This upgrade service will be available from April 4th, 2014.
If players have purchased a physical copy of the Standard Edition but wish to upgrade to the Digital Imperial Edition, our upgrade service is also there to assist them.
Good, I hope everything remains exclusive for those who pre-ordered, be it the normal or Imperial edition.
I seriously doubt a company is going to stop you from giving them more money ever...
https://help.elderscrollsonline.com/app/answers/detail/a_id/4729/ <- this is not official i guess...
Because of this FAQ exist, people were unclear about it so this user emailed them and ask them directly. However, it could be fake or misinformation from support.