Yeah, that is why I mentioned it. However, I am afraid it will only be an app (certainly in the beginning). There is no laptop version in the making.
I am an old anti-Apple guy too, but I do have an iPhone and iPad and even a MacBook Pro. Why? Because they are actually very good for the purpose. I use my MBP only for DJ-ing, nothing else. For the iDevices Apple’s strategy of keeping things very close to the chest actually adds up to a very stable result there.
Not trying to sell you on an iPad, but in our business lots of things come to iPad ages before they come to Android (if at all).
The alternative is software like you already mentioned or getting a bigger hardware controller.
Greetinx.