Found this interesting, being an Arch ( Rolling Release ) user myself. I don't see why they couldn't do it, especially if they're going to keep the LTS as an option.
SourceCanonical developers are again taking a serious look at moving Ubuntu over to a rolling-release model. Under this form, there would be the Ubuntu Long-Term Support (LTS) releases every two years but between that new packages would be pushed out on a rolling-release basis.
For years there has been talk about turning Ubuntu into a rolling-release distribution, but previously nothing has materialized beyond some mailing list discussions. There's also been discussions of Ubuntu on a monthly release cycle, but again, it's been mostly all talk.
In January was more serious talk about Ubuntu moving to a rolling release model. Leann Ogasawara, the Kernel Team Manager at Canonical, talked about moving to a rolling release model for Ubuntu 14.04 LTS. She said it was "in the cards of possibly happening." It would involve eliminating the interim releases and only putting out the Ubuntu LTS release builds every two years. New packages would be pushed out after they are released and have cleared QA.