According to Digital Foundry, the recent release of GTA: San Andreas on Xbox 360 is a port of the mobile version of the game.
“Viewed side by side, Xbox 360 and Shield Tablet games appear to be a close match. The higher-resolution 2D artwork and the new front end are much the same, though the new console release appears to possess enhanced draw distance over the Android version (even when it’s set to 100% on the mobile version). Unfortunately, aside from the inclusion of Achievements, there’s very little love given to this new edition. Just like the Android release, there’s absolutely no anti-aliasing available, whereas even the original PC version supports this, while the vast majority of Xbox Originals on the 360 emulator supported 2x or 4x MSAA depending on the title.”
Although we weren’t expecting any different, it’s still a shame. Especially when you realise the frame-rate is capped to 30fps.