Don't go see the new "Iron Lady" movie in theaters right now. 70% of the film portrays Thatcher in her current state as a helpless 90 year-old struggling with dementia. This would be no different than putting out a film called "The Champ", complete with badass promotional displays of Muhammad Ali in his 1960's prime, only to have it be a 2-hour portrayal of the former boxer's present-day struggle with Parkinson's. Sorry, no time for scenes from the height of his popularity - you know, the ones that people might care about and that actually made the man famous. Not entertaining and in no way pays tribute to the main character's defining triumphs.
And that's probably the whole point. Why pay tribute to one of the greatest conservative leaders of our time? Far better to portray the right-wing pro- (or is it an-?) taganist at her weakest and hopefully cast aspersions about whether such mental deficiencies existed during her time in power.
I'm a huge Reagan fan but I have to say my favorite politician of all time was Thatcher. More so than any 20th century politician, she cut against the political consensus of the time and fought tooth and nail to revolutionize her nation's economy. All four of her successors, split across both parties, have credited her with positively transforming Britain.
A far better account of Thatcher and her reign can be found in Part 4 of the BBC's History of Modern Britain, which came out a few years back: