it is possible but is going to work out expensive I had to install a similer thing for a showroom recently. first you would need 4 of
these which are the best prices I could find for them.
you would also need one of
these to split the pc moniter output 4 ways
all in all proably looking a 250-300quid for these parts oh and the screens would need to have standard pv monitor ports on them.
Could all be setup to run wireless but wouldn't suggest it, cable is more reliabe and it would be quite a large cost to get the bits for wireless