For anyone not on the Xojo Newsletter mailing list, there is now an official Xojo Roadmap document . I am really grateful to Xojo for providing this. I never wanted timelines or dates, I only ever wanted to know the proposed direction of the product - a high-level summary of Xojo Inc's plans in the upcoming years - and now we've got it. I hope it will be kept up to date.
Let's do our part as a community by not badgering them for specific dates for these items. Thanks @Geoff P and the Xojo team.