Handset cohabitation: Ubuntu for Android

The issue I believe is storage. With quad-core ARMs almost standard on next-gen high-end gizmos, fire-power might not be the biggest issue; to the exception of workstation-replacement laptops. But not having my typical laptop-like storage (i.e. > 150GB) to run around with is an issue. And I mean built into the phone, not some USB-connected addon.