use

We use the future progressive to say that an activity will be in progress at a particular moment in the future.

• This time tomorrow I will be lying on the beach.

The future progressive is also used to talk about future events which are fixed or arranged. It does not suggest the idea of personal intention.

• We shall be visiting Darjeeling in the summer.
• I will be seeing you one of these days, I think.
• He will be having a nap in the afternoon.

predicting the present

The future progressive can also be used to say what we think or guess is probably happening now.

• Don’t phone now – they will be having lunch.

polite enquiries

The future progressive can be used to make polite enquiries about people's plans.

Compare:

• Will you be coming with me? (a polite enquiry about what has been arranged)
• Are you coming with me? (pressing for a decision)
• Will you come with me? (an instruction or order.)