Kind of surprised at the way Colin is defending PS2 games on PS4.
Bringing up NES games not working on N64 just seems silly when the physical format is different. Gamecube games do work on the Wii U, for instance, but the physical discs do not due to the change in disc drive.
The PS4 can read PlayStation 2 discs and could simply verify the license and download the appropriate files. This is precisely how 360 compatibility on Xbox One functions - it never actually plays the game FROM the disc, it only uses the disc as verification.
All models of the PlayStation 3 can read PlayStation 1 discs is another thing to consider. He's saying it's ridiculous to expect a new machine to read games from two generations ago...but Sony set those expectations in the first place on PS3.
Even if disc support is impossible, the more troubling issue stems from those that purchased PS2 classics via PSN for use on PS3. I feel that this should at least be available for users.
Basically, Sony set expectations last generation on PS3 with PS1 games (and PS2 compatibility on many models) and there is no physical reason why PS2 games could not be read on a PS4.
This doesn't even cover the fact that some of these games do not work as well as they should. All three GTA games suffer from severe frame-pacing issues, for instance, which feels unacceptable. The fact that European releases are based on PAL releases is even more disappointing.
I honestly never expected PS2 discs to work on PS4 and am not disappointed that it has not come to pass, but I feel that the excuses being thrown around are a bit silly.
There have been hundreds of posts on GAF alone that argue that people should be able to use their PS2 discs in the PS4. Disc based emulation, basically. It was a non-starter from the word go - Colin is right.
PS2 discs in PS4 is exactly how PS1 discs in PS3 functioned last generation. As I've said, the discs could serve as a license check as they do on Xbox One when playing 360 games. The discs are never used for actual gameplay. My point is simply that it should be technically feasible to work AND expectations were set by Sony last generation. Comparing NES games on N64 to this situation is ridiculous since there is a physical barrier there.
I don't think they should be free either, but I was annoyed at his lack of understanding in how this could actually work.