Considering the followings hypothesis :
- "Only" 8 tracks at the begining (I suppose more will come but like Pulse (and not like Pure) it won't be free) which were enhanced from previous versions ;
- no physical support, distribution charges, etc. ;
- no possibility to re-sell the game as "used".

So IMO, the game should not be sold more than 30€. Otherwise, I won't buy it (but i'm sure plenty of people will buy it anyway).