High Definition streaming requires high date rate transfer which made cables a necessity for streaming to be possible. Due to cables, lot of compromises had to made when it came to flexibility and accessibility. But with wireless HD steaming being possible with the use a device name Cube which creates an adhoc network which allows you to stream video at 720i, 1080i.
This impressive product Cube has been manufactured by a company based out of Irvine California named Teradek. They are various products ranging from $1,900 to $2,100 depending on what you want to stream.
Reference: Philip Bloom