Hi diab79,
We normally don't monitor this forum for vSphere Client (HTML5) related questions, but I had this passed to me by a colleague. We do have accessibility on our list of items, so we do plan on improving the current experience when it comes to keyboard navigation. We know in some cases Tabbing works, but there are missing highlights (so you don't know where you're tabbing to!), or tabbing order doesn't make sense, or some places are completely inaccessible (the worst case).
We can't really give a timeline on these things, but we are looking to improve them. If you have specific areas of keyboard navigation you think are much more important than others, that would help us in prioritizing those and making them happen sooner. Please post here if you like, or on our Fling page, where we usually collect most feedback: vSphere HTML5 Web Client
