Reiss covers the Patriots for ESPN, and the respected beat writer did a live shot after New England's win in the divisional round, and said the following regarding Gronkowski's injury:
Afterwards, in the locker room, a lot of attention placed on the backup tight ends along with Aaron Hernandez as to how the Patriots will proceed without Gronkowski. Of course, they have some experience doing this playing five games without him at the end of the regular season. Michael Hoomanawanui now becomes a big part of the Patriots attack, as he was against the Texans in this game.
He's right. The Illinois product who has, easily, the hardest last name to pronounce in the NFL right now, will be a facet of New England's offense heading into the AFC title game.
However, Hoomanawanui didn't record a catch against the Texans, and he clearly isn't as formidable a receiver as Gronkowski.
His presence will mainly be felt as a blocker.