I've seen screenshots in CyberStratege (French Newspaper - Buy it
). It seems there will be on the main screen a bar indicating the resources owned by the player. It's a good improvement. The same is planned on HoMM5 and a beta-tester suggested something like that :
It seems a good idea to show the monthly income too (except for the slashes, imho useless here).
A imo better idea would be to show the monthly expenses between brackets (upkeep for money, sum of monthly cast spells for gems) :
Example : [gem icon] 150 +10 (-5)
The player owns 150 of one gem type, gets 10 per month and uses 5 per month.