The Ultra’s ethernet port might be essential for some users, but you can buy a $15 ethernet adapter for Google’s Chromecast ($35 and up) or Amazon’s Fire TV devices ($40 and up) and still ...

Roku said that it’s expanding distribution to get the ... USB and a 10/100Mbit Ethernet interface. You can also connect it to a wireless network using supported USB wireless Ethernet adapters.

To use Roku's virtual remote, your Roku and other device need to be on the same network. Your Roku needs to be connected to a Wi-Fi connection to do this — otherwise you'll need Ethernet.