Historical accuracy seems not to be important at all in the entertainment industry, but whatever is the current fashion (or is cheaper) IS important. Thus we have the spectacle of a German First World War army making an attack, equipped with Number 4 rifles ("The Blue Max").
Look at "Enemy at the Gates" for an example; they spent more $$$ on doing the Stuka attack at the beginning of the film by CGI than Junkers would have charged them to build a real, honest, full-size Stuka, complete with dive brakes and sirens.
I am TIRED of seeing Tigers and Panthers in movies, all with DEAD-TRACK (rear drive sprocket) chassis on the things. Both (as all German-designed tanks in that war) were LIVE-TRACK designs (forward drive sprocket) for one reason: a live-track chassis can CLIMB HILLS much better than the dead-track type. This was proven again in Korea, when the obsolete Shermans were used to push the more (cheaper) modern tanks up the hills, even though they used the same master weapons and the same co-axes. In the end they gave up on this foolishness and just used the 'obsolete' Shermans to do the job.
And an M-48 does NOT look like a Tiger II, either. "Battle of the Bulge" was one of the greatest disappointments I ever endured on the big screen. The only tank which can double, more or less successfully, for ANY Tiger is the Comet, which, despite its smaller size, can be used as a fairly-decent double for a Tiger I ("Night of the Generals").
Why not just use the right tank for the job? And if you can't find one, BUILD a PROPER double: no more second-hand Russian APC chassis with fake Tiger upperworks.
In the immortal word of Charlie Brown, "Arrrrrrrrgh!!!".