Well, I understand it would be a difficult and painful work. But I guess it's about time, since our cellphones and tablets are all overpowered nowadays. And it would be really convenient and cool to just grab your iPad and start patching some kind of sick art stuff.
I am not saying it should have all the features of Max, but maybe a lightweight version of Max should do the most of the things okay.
And I think it isn't just a daydream. As far as I understand, most part of Max is built on JUCE platform, which also supports iOS and Android. Therefore, there might be a chance of porting the original Max code to mobile platform relatively easier than we think.
At least, an patcher editor app, linked to the Max on the computer would be nice. A touchscreen is perfect for something like Max, don't you think?
And yes, I know there are Windows tablets which could run Max, but that cannot be a perfect solution. I don't want to spend money to buy another gadget that I will only use for patching.
I think Max 8 is not far away, and Max Mobile for iOS/Android will be such a great addition.