I think you answered your own question.
Outside of the impressive 4K HDR visuals we don't know a whole lot about the game so far:
- The car count is great (it's up there with Gran Turismo 4) but until the car list is revealed we can only guess at how much of that is new or "worth driving".
- The only thing we know about Multiplayer is some vague wording about eSports and spectating. Nothing on flags, penalties, qualifying etc.
- No word yet on if popular community features like the Storefront and Auction House will be included.
- Customisable drivers is a good inclusion but we haven't seen it in action and only found out about it by scouring some paragraphs in blog posts.
In short we don't know enough about the game yet to "get hyped". Pretty cars and tracks is a given, that doesn't seem to excite us as much as a lot of us are focused on features.
There's plenty of time until the game launches, lots of potential for news/announcements.
--
Personally, I'm cautiously optimistic. There are a few things I need to know about before going all-in however.