The Raspberry Pi is a game-changing computer. While it was primarily designed as a low-cost base on which students could learn to code, it has proven to be much more. Some consumers buy it for HTPC purposes, but more importantly, developers embrace the little computer for other projects, such as IoT.
Unfortunately for some developers, the ARM architecture and rather anemic performance make the Raspberry Pi a poor choice. While some consider ARM to be the future, I'm not so sure -- x86 has been surprisingly adaptable. Today, Canonical releases an Ubuntu Core image for the x86-based Intel NUC DE3815TY. Priced around $150, this NUC is more expensive than the Pi, but it is much more powerful too; a better choice for developers needing an x86 platform.