Well it will be more than one :)
Games are my best guess at the moment. Steem Monsters. If we take a look at the trends in EOS, gambling as well .... magic dice
Also light interface dapps.... Partiko, Appics, Actifit... Dtube is a great project ... but they need to tokenize their platform ... Buying online... to bad that dstors didnt went well.... maybe a new candidate will come out... Long list here :)
I've heard that most of the gambling dapps on EOS are bots trying to outperform house edge from airdropped token on their accounts just cause they had EOS.
Yep ... bots are always in the game, even here on steem based gambling dapps. Magic dice is very atractive since they offer to share the profit with token owners.