I think 21 is a more likely milestone birthday in this case.
Viacom are continuing to invest in good quality factual programming. Channel 5 has announced the following commissions:
The Great Fire of London (3x60, Lion TV)
Pompeii: Countdown to Disaster (3x60, Voltage)
Rome (8x60, October Films)
Elizabeth (3x60, Oxford Film & Television)
Wallis Simpson: The Woman Who Brought Down the Crown (1x120, Elephant House Studios)
Queen Elizabeth: The Queen Mother (2x60, Blakeway)
The Man Who Built the World: The Story of Isambard Kingdom Brunel (2x60, Elephant House Studios)
Good quality but hardly original - almost all those topics have been covered in recent years on the main channels.
Television of course has changed significantly in 20 years so far more difficult to be distinctive, and though at times it seems confused I guess they're in a similar position to where C4 and BBC2 have been traditionally with a mixture of factual and youth programming. Like C4 too they are somewhat missing the backbone of US drama (although 5USA still has quite a bit) which used to anchor the late evening schedule and has now all but vanished in favour of light factual programming.
I preferred the internet when it had a sense of humour.