Okay, I'll say it. I don't like the colour.
Obviously, there may be options, and that'll be interesting. But if you're going to go to the trouble of making it look like an Ultra, you really need that black front.
Having had a think about it for about an hour, unless news comes of some feature I've not thought of, this is already a pass for me. And I genuinely don't get it. What Ultra users really needed was a basic, but great-performing two-channel power amp. I'm not sure anyone was asking for this. In all of the "What do you want WiiM to do next" threads, I don't remember seeing anything like this mentioned, though I may have missed something.
If you already have an Ultra, you don't need anything other than the power amp stage, meaning you're paying for a whole lot of stuff you don't need. If you're in the market for a new set-up, why would you want to buy two units where there's a great deal of duplication over the pair?
And if it's aimed at people with just a basic streamer, why make it look like the Ultra?