I'm considering buying a Open Logic Sniffer but i need to know somethings first:
does it work only like: trigger -> record -> view results
or can it also be operated such that it shows in real time the logic states of its input pins on a PC screen?
Only as you mentioned. Sending real time logic states for a fast signal is a lost cause anyways. You cannot track the signal and you cannot push data that fast to a computer.