I suppose both, but initially G4/G5 type devices. I’d love to get Ubuntu MATE working on Power8 though.
But PowerPC (G4/G5) is the initial focus. To that end, I submitted patches yesterday that will also us to build Ubuntu MATE 15.04 PowerPC images on the official Canonical infrastructure.
@smiffy, I’ll need you help you make sure the Ubuntu MATE seeds are correct for PowerPC.
Good news, the Ubuntu MATE are now mirrored in the official Canonical infrastructure on a daily basis. I know you sent me your seed modification in the past, I’ll try and merge them later