Since there has been so little information about this possible 'Apple Home' device, I don't think anything will be launched this month. We might get information about what's coming later in the year.
Would I buy one? Absolutely! If it can control my lights, answer questions, store reminders ect then it will be a great addition to my Apple devices. It all comes down to price though. $149 is the highest they should go but knowing Apple it will probably be around $199.
I'd love one. I've got loads of smart devices all connected via HomKit and currently control them using device and Siri.
If it doesn't have a screen there could be an app or it could use an Apple TV as a happy medium.
I've looked into Alexa and Google but with an Apple house it's not quite there for me