Guarantee you've never made a game in your life.

Implementation of this feature wouldn't require much in terms of processing power or storage. It would just be a more interesting and engaging way of getting to pokemon beyond the current "click it on an overhead". Game programmers and designers could definitely work with this description to make a feature.

Sure. But it's not fun. Which is way more important than any of the things you mentioned. The first thing a game designer thinks of is fun, not system limitations.

What's not fun is the presently 'mapless' version of Pokemon GO we all have access to.

Sure I can see if I am near a Pokemon, but I can't actually go after most of them due to GPS jitter and the time it takes to walk/cross at lights in cities.

If I absolutely knew which direction to go there is a CHANCE I could get to a Pokemon before it despawns.

As things stand now I pretty much have to win a small lottery to capture one where I happen to be taking a scenic walk.

I am not talking about the current version about pokemon go. I am talking about the version suggested by the commenter above.

That's pretty funny, as I've actually worked on close to 20 released games now, for several different companies and independently.

If you mean they wouldn't hire him just for having ideas, then that's generally true, although I have seen someone hired as a consultant to design the economy of a game since he was a self-described 'free to play economy expert' with several articles posted on gamasutra (yeah, there was all sorts of problems with that project).

I was mostly just affirming that I thought his idea was a good one, not that I actually thought Niantic would hire him based on a forum post.

EDIT: Apparently you think the feature is not fun, well I think the rules for GPS games are not necessarily the same as static games, and the hunt and exploration and tracking could actually be fun when your movement actually matters. And it's a lot better than "you might get these pokemon if you run around in circles for the next ten minutes and get lucky!" that currently exists right now, which is shit and very unfun.