You know very well 64k of memory isn’t enough, it wasn’t enough for running the new OSs and software that kept appearing. The necessity of more RAM showed up. The necessity of hardware acceleration didn’t necessarily showed up yet. (I can’t see it. Anyway it can be enabled. And it’ll be improved to work better for more people and will be enabled by default “soon”. When it’s needed it’ll be made. Opera just noticed it’d be a waste of resources continue *focusing* on it and that they were losing time with it, holding releases, keeping more branches of the software [11.6x, 12 'Next', Labs, and who knows how much more internally] [lead to more time checking for errors and regressions], etc…)
Plus, I’m not seeing anyone (any relevant company) interested in making a game in HTML5 right now.