I also have the PC version, and upon taking a look at a number of scenes from an old saved game for comparison, I can confirm you're talking rubbish. With the unfortunate exception of the iPad incarnation's low-res map screen, and the fact that the edges of locations on the iPad are cut off due to the aspect ratio (not an issue on iPhone/iPod Touch), the two versions are almost identical graphically. PA HD on iPad doesn't even come close to being "significantly worse", "horrible", or "shit", and such hyperbole is simply ridiculous. I'm very tempted to go in for these, but the first episode of L&O was very short, certainly shorter - and a lot less gripping - than The Walking Dead (maybe 30-40 minutes at the outside), so I'm not sure I can view it as value for money, even at only a dollar per episode. Anybody able to provide more info as to the substance of the other episodes in the L&O series?
Back to the Future is a lot of fun, and quite a sizable adventure to boot; if you're a fan of the movies, it's even better, naturally. I haven't played Jurassic Park, and it hasn't fared too well ratings-wise, but I'm tempted to grab it anyway as I've found Telltale rarely misstep to any huge degree.