Obviously with every vendors trying to build an Android tablet now, most of them will fail and out of the race in a few years time. However, a few vendors will come up on top, using similar spec and hardware, and the sheer volume of the combined sales will drive down the component prices. The situation is same as the early PC era back in the 80s.
Apple currently has Achille's heel which will eventually undermine their own dominance. Their excessive need to control and maintain a closed platform will turn many buyers away to the Android camp which will remain open, and their conflicting need to control the media format on their platform (such as the fate of those who need to sell content and hardware at the same time, such as Sony), will eventually put up too much stumbling blocks for them that other vendors will move ahead.
However, if Apple is able to such inherent pitfalls in their business, they might eventually dominate the tablet sales, and in many ways, making in roads to even productivity platforms (i.e. intel/Microsoft domain). However, the challenges are many and I don't see how they can really succeed.
Before that can happen, Intel and Microsoft are going to throw away so much money to stop them, and every vendors will be supporting due to the fact that Apple runs a closed platform which no other vendor can benefit except Apple itself. Being closed platform will eventually lead to Apple's downfall.