Google team is gracious to inform us about this decision in advance and the intentions behind this move, which we very much respect. At Zoho, we see HTML5 as the future of the web, and we plan to move our apps in this direction.
As far as Offline support for existing Zoho Apps (Zoho Writer & Zoho Mail, primarily) are concerned, they will continue to work for now as we migrate towards HTML5. We internally are experimenting with HTML5 and we are excited to see the possibilities.
It was a great experience working with the Google Gears team and we now look forward to working closely with HTML5 team.