1. intel has a certain business model that probably requires some level of monopolistic or quasi-monopolistic control on the market(with 80% profit margins).
2. it's strength is within the x86. maybe x86 can't be competitive with ARM on power/performance ? time would tell.
3. is not perfect. has already failed in the ARM market(sold it's ARM unit) , and probably failed in the GPU .
4. performance: in today's world , where things like memory accesses, cache sizes and multi-core connectivity are very important to performance , intel has some contenders in those areas, for example IBM(CPU+DRAM manufacturing on the same die, optical connectivity), tilera(64 core chip, with claimed better performance then intel at an older process node).
5. performance: it might just be that for consumer parts that require multicore (math intensive apps), a gpu is prefered, and a 4 core cpu is enough.
6.ARM biggest advantage is it's open business model , that leads to a very large cooperative ecosystem both at the hardware and software levels.
And if microsoft is serious about the ARM move, intel has just lost a large part of it's biggest competitive advantage.
So i wouldn't be so sure about intel's bright future.