I think Ars just did a feature on the RFID thing in (US) football. They aren't doing the ball, and not releasing all the data (of course) but all players are being tracked accurately.
They could easily do this sort of thing. Same when they whine, "oh not all of our stadiums have HD cameras, or enough of them, or slo-mo, or blah blah blah". Cry me a river.
And how many times do we need to see some random piecemeal "gee that can't be reviewed so maybe it will be added to the list in 3 years" crap with replay?
As for foul calls, penalties (both in-game and post-game), and refs/umps: allow replays when the officials want them. Start grading officials every season and low performers are out - perhaps only use most recent season to average it out for them. This should help getting officials in who understand technology, keep up to date on rules, and aren't so prideful that they won't check replay. Penalties should be called evenly of course, and more importantly, in the post game scenarios, drop the hammer regardless of result. Crosscheck a guy from behind headfirst into the boards? Doesn't matter if he's a vegetable this time or not, buh-bye. ( Now a good fight? Those can stay ) Oh, and officials in any large money sport should be full time and paid decently.