Generally most telephone and broadband bundles do not include calls to mobiles, or it is available as an add-on. A ruling by the UK Competition Commission as the result of an appeal by Three and BT over a previous Ofcom decision could see call termination prices lowering by 85% rather than the 80% Ofcom proposed and a year earlier than Ofcom originally planned.
ZDNet's David Meyer's article has a graph showing the scale of the changes, and that the cap should be 0.67p in 2013, down from the current 4.18p per minute. Whether providers will pass on the reductions to consumers is another matter, but it would seem there is scope for more bundling of mobile calls into landline calls bundles.
One side effect of this, which appears to already be happening is that Vodafone and Orange have raised Pay-As-You-Go rates, based on the previous Ofcom ruling. Some countries solutions to the cost of handling incoming calls to mobiles has been to actually charge the person receiving the call too, in the UK the most likely action will be that the cost of handsets will rise.