In the Redemption through Moshiach, and especially when the dead will be resurrected, the learning of Torah and fulfillment of Mitzvos will be at the ultimate perfection. We will learn new, inner, hidden Torah insights. We will be able to fulfill all the Mitzvos, including those that depend on entering, inheriting and settling in the Land of Israel and building the Beis Hamikdash (Holy Temple), and furthermore – more perfection of it being fulfilled just as G-d wants it, after the complete refinement of the things being used to fulfill the Mitzvah, and the perfection of the person fulfilling the Mitzvah.
(See talk of the Lubavitcher Rebbe King Moshiach Shlita, Seitzei 5751 (1991))