See this recording of a lecture delivered on behalf of the IET Reading area, giving my views on the background, status and potential of in-building wireless. Warning – it’s over an hour long!
Lecture at iet.tv (the lecture itself starts after 6 minutes – you can fast forward to this point)
For further reading on this subject, see chapter 13 of this book:
or this recently published text on in-building design with distributed antenna systems: