Hi Rendu,
Still seems early days for the whole wifi HDMI thing!
I came up with a solution for my own set up which involved using a temporary projector at the rear of the room.
BD player, Sky and amp at the front of room. Connected 1 x Lindy 7.5m flat HDMI cable (£35 from Lindy.co.uk +p&p)and ran it under the carpet to the rear of the room. From here i use a fold out bookcase that i purchased form Argos for £38 ( not sure if still available) to support the projector when in use. When the projector is tucked away the bookcase folds flat and goes under my settee -out of sight. Have a permanent 77" screen at the front of the room flush to the ceiling.
Works well for me and good value. I guess you could always use a tabletop projector though or perhaps a permanent shelf or unit at the rear with a flat cable. We have a small child so trailing cables are now a thing of the past.
Hope this helps in some way.
Regards,
Cookie Monster