Ubuntu 13.04, the next major release of Ubuntu will include Windows installer, popularly known as Wubi. This software allows one to install Ubuntu inside Windows operating system as a program and allows easy setup of disk partitioning, user setup etc. The installer was included by default in previous versions of Ubuntu but was dropped in Ubuntu 12.04 and Quantal.
The main reason of dropping Wubi was lack of it development. However, developers in UDS are planning to redesign it again. This will make it easy for Windows users to install Ubuntu, specially those who don't know about hard drive partitioning and OS installation. Also, easy removal of Ubuntu, and a complete redesign and makeover are being planned. Wubi may also include encrypted installation support.
Among other things, Ubuntu 13.04 is also going to include an SDK and will be targeted to a large number of devices. Canonical is putting efforts to make Ubuntu more friendly for laptops, netbooks and tablets by increasing better battery usage and better support for mobile environments. It will be interesting to follow its development and see if Ubuntu 13.04 becomes the best release ever.