It's been a while since Roku updated its set top streaming boxes. Today its two highest-end models, the Roku 2 and 3, are getting a minor hardware revision, but it's the accompanying software upgrade that's adding some welcome new features. Firstly, the Roku 2 is getting the same processor and other internals as its big brother, while keeping its $70 price. The 3 remains unchanged on the inside, instead its big hardware addition is a microphone on the remote. Why a mic? Well one of the big new features of Roku's software is true voice search. A dedicated search button on the new remote quickly lets you find content by searching for actors, directors, titles and finally by channel. And if the on-screen keyboard isn't quite your speed, you can speak your query. And if you have an older or cheaper model, you can still take advantage of the new voice search through the updated mobile app.