A litte late, but I tried the Wiim app on a chromebook and here is my experience.
In short, chromebook is not great if you want Qobuz with Wiim devices.
When you first install Play Store on a chromebook, there are some questions that must be answered correctly. The most important is location services. If Wiim android app does not have access to "enough" location data, something is guaranteed to not work. The second relates to discovery of nearby devices. I dont know what it means precisely, but it's certainly necessary if you want your android app to discover Wiim devices reliably.
When you get your Wiim android app connected to your Wiim devices on a chromebook, there are some things I dislike. My chromebook uses i5 CPU made by Intel, and running graphic android apps really hurts battery life. When the app is visible and active, my CPU is constantly exercising all cores. If I understand correcly, all that code for wiim app is optimized for ARM architecture, and this ARM code cannot work on intel CPU as is. The current solution by Google is to run a virtual ARM architecture inside the intel CPU. Every single instruction sent to this ARM CPU from the android app thus gets more than one instruction to be executed on Intel CPU. On top of shortening battery life, the graphics look like they are scaled or converted (shapes other than straight lines are not sharp). A few times active android app also made my laptop fans scream louder than ever before during the past 5 years I've used this chromebook.
Additionally there can be a variety of other problems with Wiim app running on a chromebook. In my case, I was able to start listening to Qobuz from my favourites only. This means I need to do searching and browsing through qobuz web app on the chromebook, adding everything that interests me into my Qobuz favourites, and then merely control the playback of myfavourites from the virtualized wiim app. Some may ask if using Wiim chromecast abilities would make life easier for a chromebook user. Unfortunately chromecasting from a chromebook to my Wiim Pro was not lossless. I can't remember if it was limited to 48 kHz only, but the sound quality certainly wasn't acceptable on any kind of music I tried to play that way.
To me it seems best to use a mobile phone for controlling your Wiim devices. If you keep your mobile phone screen always on at lower brightness, you are still going to get better battery life than running Wiim app virtualized on your Intel CPU. I don't know how much better the battery life could be on ARM chromebooks. I will remain sceptical on Google achieving anything this complicated working 100% all the time with ARM either.