Is it possible to connect a Blu-Ray player to the PC / Laptop?
A real Bluray player (no drive!):
on a PC monitor: no problem
on a laptop: few have a video input; most of them only have exits
If the PC has corresponding A / V inputs, it works. Is it just the question of what the whole thing should be.
a BD drive in the computer should serve the same purpose.
So theoretically, it would certainly be technically feasible.
But usually it should fail already because PCs usually have no HDMI input - and that is a prerequisite that you can display HD content.
Second hurdle is the HDCP copy protection, which must be supported by all involved hardware components.
I would simply install a BluRay drive / burner in the PC. This is much less complicated.
The built-in burner is even better, because of A / V inputs (analog) you will not be able to transport an HD image - and digital AV inputs have not caught my eye with motherboards and GraKas.
There are HDMI capture cards, but they are quite expensive…