Yep- MacGyver is still cool! Of course, I think the Super Bowl ad from a while back helped bring MacGyver back into the general public's minds.
And many of the people who grew up with MacGyver are now in their 20s- and the whole "whatever was cool 20 years ago becomes new and cool again" cycle goes on.
(This is a theory that seems to be true- probably because the decision-makers get nostalgic for their youth and revive stuff from the good ol' days.
I can point out a few examples of this on TV and in movies- in the 1970s, people reminisced about the '50s through movies like "American Graffiti" and great shows like "Happy Days" (both of which starred Ron Howard, by the way- in fact, the movie was a bit of inspiration for the TV show, to some degree) - And let's not forget "More American Graffiti" the not-too-well-received sequel.
And in the 1980s, there was a bit of nostalgia toward the 1960s, especially with the ongoing Cold War and MAD (Mutually Assured Destruction) being pretty reminiscent of the Cuban Missile Crisis and such-
and the best example on TV I can think of is "The Wonder Years". And there were also shows set in the Vietnam War, like "Tour of Duty" and "China Beach"
And then by the 1990s, we had nostalgia for the 1970s going on with the obvious example of "That '70s Show" and the really bad remake movie versions of "The Brady Bunch". And yeah, apparently bell bottoms became cool again- but I don't really care much about fashion.
And so in the 2000s, the 1980s have been coming to the forefront (but as far as I'm concerned, the '80s have always been cool!

)
And we've seen the revival of numerous '80s shows like "Hunter" (2003 NBC revival series) and more recently "Knight Rider" and of course cartoons like "Teenage Mutant Ninja Turtles" (classic 1987-1996 series, not-so-classic 1997 live action series, and now 2003 cartoon series), "Transformers" (numerous various series- "Beast Wars", "Beast Machines", "Armada", etc. and a new one that's currently rolling out in wake of the live action movie),
"G.I. Joe" (classic 1982-1987 Sunbow series, DIC's 1989-1991 series, 1995 "G.I. Joe Extreme" series and now "G.I. Joe Sigma Six"), "Inspector Gadget" had spin-off series in the late '90s ("Gadget Boy"), and "He-Man and the Masters of the Universe" (1983 original, 1989 "The New Adventures of He-Man", 1985 "She-Ra: Princess of Power" spin-off and the 2002 "He-Man and the Masters of the Universe" cartoon)
and there's still others- like a new "Care Bears" cartoon that recently started, new series of "Strawberry Shortcake" videos, toys and new specials for "My Little Pony", the Cabbage Patch Kids are back at stores, Popples came back to stores, Glo Worms came back to stores, Rainbow Brite toys came back for a while,
and still more have made their way backt o comic books- like Voltron, He-Man, Battle of the Planets, Teenage Mutant Ninja Turtles, Transformers, G.I. Joe, and one of my personal favorites- ThunderCats!)
It'll be kinda sad when the general public starts getting nostalgic for the '90s... and to some degree that's probably already happened- though my nostalgia meter runs really low in the '90s- not quite as much cool stuff there for me as the 1980s and previous decades hold.
Anyway- MacGyver is cool in any decade!