Anything which draws inspiration from the F-14 is bound to be awesome. This is undisputable.
Walkers in modern (or futuristic) warfare is a fascinating discussion. Arguing away the impracticalities while trying to communicate an advantage is a great argument, to say the least. I recall a cadet-led briefing at the end of last semester in AF202 where one of the former cadets attempted to discuss the viability of the "giant fighting robot." I tried to "rip him a new one," but the Captain in charge of the class managed to avert the poor fellow's demise... I think he was using Gundam as an example.
Now, if your "giant fighting robot" can do as advertised on screen, maybe it could work. This involves super artificial muscle assemblies (pneumatics would be a joke for a system like that), a nuclear reactor (for those engines and RCS batteries that would be required for that sort of maneuvering... or power in general), a shield which would AT LEAST be used to somehow reduce air resistance (Ionic Breeze?), the ever-popular inertial dampner, artificial gravity (kind of the same as the inertial dampner), unobtanium, and last and most important, magic. If you can get those to work, by George, YOU CAN DO IT!
Otherwise, no.
Or can you? Some big bipedal (or more legs if necessary) machine can theoretically step over big obstructions which a smaller, smarter vehicle might have trouble with. Thus, a walker might be a valuable combat asset in rough terrain where it can hide its unwieldy shilouette. This might also apply to urban areas as well. But to operate in these environments, a walker would probably need to be lighter and smaller, probably more like a helicopter with legs. AND what I mean by this is that the walker's frame would only be enough to carry the engines, crew, and payload (hence the helicopter comparison). Since super-agility would imaginably not be attained, the walker would behave more like a legged tank, advancing with caution and relying on infantry support. And melee? It's possible to get swarmed by infantry with anti-tank weapons like charges. So sure, give it a few flame-throwers!
In general, I've not seen too many practical walkers from games or shows. If I had to choose one, I might well pick the Goliath from StarCraft. It actually matches my description of a practical walker in many regards, actually. Its high profile makes it a double-edged weapon (for itself and its adversaries) in urban areas (they have a hard time hiding... it does too), gives it good mobility, and it only carries what it needs. It carries a small gun used imaginably for picking off infantry (never seen in use in the game), cannon for larger ground targets (if it were real, aerial targets), and a missile battery. It also carries a single crewman.
It brings only what it needs to the battle...
But, just like StarCraft, if we do see combat walkers, ever, they'll probably be more like the powersuits used by Marines. Or perhaps like those suits seen in Ghost in the Shell...
Or maybe we'll ride on Boston Dynamic's Big Dog with a .50cal (Sandwich would approve)...
-Thaeris