Well, one year on and Uber has not been able to get its house in order. This move will doubtless be extremely unpopular with Londoners, many of whom will suspect that the black cab unions are behind it. Uber called Tfl's bluff last year knowing there would be a public backlash if their services were withdrawn. It will be interesting to see how it plays out this time.
Regardless of your opinion of Uber and their labour practices, they offer an incredibly valuable service to millions of people. They have massively increased the availability of minicabs, made booking them incredibly easy and safe (not to mentioned with far better coverage than was previously possible) and affordable to more people. Not only that, thousands of people now make a living driving Ubers whom before wouldn't have been able to get a job as a minicab driver at all, as the firms would artificially limit numbers to keep fares high.
Uber and Tfl are both playing a risky game here.