Describe the signals more - are they 0/5V kind of levels, or something else?
Will determine the kind of hardware to use to sample the signals.
Once sampled, can send serial messages to the laptop to do whatever with.
These sensors are capable of measuring force in a analog way. Meaning that they can see how much pressure is being applied in a given time. In other words you can see with how much strength a person is pressing a button, opposed to knowing just if the person pressed the button or not. If you want to know if 27 inputs are pressed or not pressed you can use digital buttons see this: Arduino Playground - KeypadTutorial
Possibly you would want a I2c port expander Arduino Playground - I2CPortExpander8574
This will save you a lot of circuitry
On the other hand, your goal must be to check if a certain pressure threshold has been surpassed, i.e. if a person or object is applying a force greater than a certain amount. This needs different circuitry, you can search for comparators with ampops http://www.engineersgarage.com/electronic-circuits/opamp-comparator
This will check if the voltage getting out of your pressure sensor is higher than what you established beforehand and output 1 if it is indeed or 0 if it is lower. This will also need the first part of my answer, i.e. lots of digital inputs, I2C por expander recommended.
At last case, in which you need to see at all times what is the pressure the user is applying right now, you will need a multiplexer, because the arduino has limited analog inputs. In this case see this Arduino Playground - 4051
Since you've backed off to just needing digital inputs, here's another way to consider.
4 input shift register. Inputs pulled high, and DIODE-AND connected to input with internal pullup resistor (or add an external pullup).
Any switch is pressed, the diode cathode getting pulled causes a Low interrupt - the interrupt creates a latch signal to capture the state of all the switches, clock them all in with 4 SPI.tranfer( )s and look for 0(s) in the 4 bytes.