We at Quantum1Net believes what needed is higher amount of data transaction and speed, lower power consumption and stronger security.
https://github.com/quantum1net/DocumentsOther than that, what do you think?
Nothing actually. If one blockchain can get high throughput, low energy consumption and high security (high level of decentralization) at the same time, it will be mass adopted for sure. In my opinion, it is just very hard to achieve that.