He is a young, talented roider who produces some entertaining moments when he has a go. He adds to the spectacle.
As yet, he hasn't won a GT, but a couple of podiums look good and he's having a very strong build-up to the TdF.
We notice him more in part because he's racing on a British licence and has fairly good grounds (a passport and a parent) to claim that connection.
He does look a strong 'un and it seems reasonable that he should state he intends to have a good go at the Tour for the next few years.
But... he has yet to win a GT. They are long races and funny stuff does happen. Lance Armstrong (for all his alleged naughtiness) did rather build up the impression that once a top rider has aimed at the Tour, he'll win it. There are so many variables that this can be an unhelpful view.
Froome will need to be careful with what he ingests and what he uses in recovery (and so will his doctors). If he chooses to go into slightly naughty territory, it will have to be with very small doses and very strict and disciplined monitoring by a top physician. He'll have to avoid punctures and mechanical failure in places where the cars can't reach him quickly; he'll have to avoid crashing and stay away from danger when it's wet or in bunches. He'll have to be quick, too. But he's already shown that he is.
He has a fairly monstrous team around him and a team structure who now know how to win a GT. I wish him well and would not be at all surprised if he ended his career with one or two TdF victories, or maybe the full set of GTs.