Eurovision's official announcement is here...
And their short video sums it up...
The public jury in each voting country award points (1 to 8, 10, 12) to the 10 songs they most like. Those points are all then added up; so if 40 countries are voting, all give 10 points to country X, 400 points will be added to country X.
That would seem to make the winner less predictable until the very end, but not necessarily avoid the Nul Points problem nor will it prevent Bloc Voting though it will hide it better.
The official "ESC" key -->