The majority of bitcoin's mining power is lining up behind a scaling solution that would increase the network's transaction capacity.
Known as Segwit2x, the proposal – if passed – could mark a significant advancement in bitcoin's years-long scaling debate, effectively spurring the activation of Segregated Witness (SegWit), a scaling proposal introduced by developers in 2015, and doubling the current 1 MB block size. But while the actual Segwit2x code is not ready for mining pools to run yet (it's still in the testing phase until 30th June), this isn't stopping mining pools from demonstrating they support the measure.
http://www.coindesk.com/bitcoin-miners-unite-behind-scaling-proposal-segwit2x/