Stolen from Neogaf:
All confirmed tonight on Twitch by Dan.
Paints and tunes can still be created, traded and used, but painters and tuners are now paid according to usage, not on an initial selling price (which is now effectively at no cost to the purchaser).
There will still be a way to search for community-created tunes and liveries, but not by using the current Storefront system.
It seems like the Auction House has been completely removed because community tunes and liveries are now free to buy, with the game 'paying' the creators based on how much their creations are used by other players.
The game will 'learn' what kind of paints you like and will direct them to you, make suggestions etc.
It was suggested that Drivatar cars (ie AI) will use community paints/liveries.
Oh, and Dan was unsure about existing wheel support, said he wasn't the best man to ask.
Disappointing news about weather and night, but kudos to Turn 10 for being up front about it now.
Edit: not sure how true this is, but it was hinted by Dan that all material shaders used in the game can be used to paint the car, eg full brushed aluminium finish, full carbon finish. Maybe leather cars? Sounds daft.
Edit 2: ALL cars are Autovista now. This possibly/probably means a vastly reduced car roster from FM4.
That fucking sucks. Night time driving is my favourite and no weather? STILL? You just lost my sale.