I also disagree on one of Tatar or Nyquist being redundant. I think Tatar's play-style is kind of a cross between Jiri Hudler and Darren Helm. Hudler in that he knows how to score goals from farther out, and they share a similar stature. But Tatar plays with a similar mentality to Darren Helm, in that he does not shy away from greasy areas, loves holding onto the puck, and is incredibly tenacous. Its that second aspect that I think gives Tatar real value to this team and can potentially make him a special player. He also fits perfectly into the fast-paced forecheck system that the Wings have utilized this year, and its been paying dividends for him.
Nyquist I'm actually kind of lost with. He definitely can score goals, but he's turning into a powerplay specialist. Half his points this year have come on the powerplay, and more than half of his goals have come with the man advantage. This could be a case of other teams playing him more tightly than last year when noone knew about him, and he has been struggling to adapt to the added pressure 5 on 5. But when there's more time and space (as there is on a powerplay), he's been able to capitalize. Hopefully with time Nyquist can become as effective 5 on 5 as he is on the powerplay, but until then, I think Tatar is more valuable to this team and has an added dimension to his game, but Nyquist has been able to make teams pay for penalties, and he's been doing it all year long. That, by extension, has been adding value to the guys on our team who can draw the penalties in the first place.
Anyway, so how they've been performing so far this year I'd say they're filling two very different roles.
I don't want to see a bunch of arrows and graphics cluttering up the screen when I'm just trying to watch the game, but this technology could open the door for a lot of real-time (or near enough) stats that commentators could utilize. It would be cool to know if Shea Weber just broke 100mph on that shot that Glendening just blocked. The trajectory thing could also help in determining if a puck was deflected before it went in the net. I can definitely see uses to this, but let's not travel back down the same road that led us to the glow-puck.