If apple built a 15" MBP Air yeah I'd buy it.
But the problem with aired or airish is what do you mean.
Air - Not as powerful processor as in a 13" MBP minuscule graphics capability (New Air's), Loose Optical, Fewer Ports. Basically Weight savings as a major design feature sacrificing some things say a 13MBP has.
Air (Aired, Airish, Airized, Airedout) - Same basic design parameters. Loose Optical, few ports gone due to case design, but overall maintaining full features of a MBP. Full up processor and one real graphics card (Dump the stupid intel integrated graphics) at levels that are found in that class of notebook.
Say 4 pounds and glossy display (Dont really care for anti-glare bezel look), 2 usb, firewire800, Thunderbolt, Audio line in, Audio line out, SDXC card slot. Also a 128 GB SSD and a 500 GB 7200 HDD.
DO this and I will Buy.