Oh the joys of computer generated images.
1 - it makes it appear that it'll be in the open air. It won't as the EBU won't let it.
2 - the stage is wayyy too small for the competition - and with that block of grey seating, there's a lot of unused space in the total area for the proposed performance hall.
3 - but at least they've provided a handy illustration of where the power generators and the broadcast compound/scanner base will be!
My user name might look like Hatton Cross, but it's pronounced Throatwobbler Mangrove.