What I am worried about is not that they will continue support, but that they will continue support until licenses run out and on renewal only offer apps for vB... I would be screwed and my users would be irate that their apps they paid for would be rendered useless.
An inside source tells me that Internet Brands is looking at TapaTalk too. Don't quote me on that. It could have been just a joke, but this person "joked" about XenForo before they filed a claim. So I honestly do not know.
I personally have little to no use for a mobile style, I (and my users) actually prefer using the full style on our phones. Now an app is a different story, especially if it supports push notifications.