Two things are going on more-or-less simultaneously - the impeachment hearings and the DACA case at the Supreme Court. Comparing the press coverage of each, you'd conclude the first is much more important than the second. And of course you'd be wrong.
The impeachment shadow play has very little importance. The House will impeach, the Senate will kill it, and at the end of the day, all that will have happened is a Democrat temper tantrum, acted out in public.
On the other hand, if the Supreme Court finds the DACA program to have been unlawful when created by President Obama, that will prove to be a big deal. Future presidents ideologically aligned with Obama cannot reinstate it if it is found to have had no legal standing.
It is no accident people on both sides of the aisle view the ideological leanings of appointees to federal judge positions as seriously important. The team of Trump and McConnell has appointed and confirmed many young, conservative judges to the federal bench. These will be influential for the next 30 years.