Roku is expected to refresh its entire line of set-top boxes any day now. Thanks to the recent work of Dave Zatz from Zatz Not Funny, we have a pretty good idea of what to expect.

Perhaps the biggest change is the shift away from its numbered naming convention. According to Zatz, the Roku 1 will be replaced by the Roku Express and Express Plus while the Roku Premiere and Roku Premiere Plus will sideline the Roku 2 and Roku 3 boxes. The Roku Ultra, meanwhile, will replace the Roku 4 as the top-tier product in the company's line-up.

So, what can we expect in terms of enhancements from each new product?

Although nothing is confirmed, Zatz suggests the entry-level Express models may feature a more capable processor with the Plus model perhaps having additional I/O ports or an improved remote. The Premium models should both feature 4K capabilities and the Plus may include an Ethernet jack, microSD card slot and HDR support

Last but not least, the Ultra model is said to add a remote finder function, optical out and USB connectivity in addition to perks from the previous tiers.

No word yet on exactly when Roku plans to announce the new boxes although I suspect they'll want to get them out ASAP in time for the fast-approaching holiday buying season.