There will be more Q5/Q10/M3 firmware. 3.0.2 will come within a couple of weeks.
Q5/Q10/M3 are international versions of hardware that is very popular in China. Whilst the products are targeted slightly differently in China (they provide Chinese streaming TV) their massive popularity means firmware will continue to be developed for a long time yet. And international requirements will be dealt with, not just what the Chinese customers want (although if you read the Chinese Himedia forums customer want the same things..).