One of my favorite subjects as of late. We can speak about any kind of unity we want, but the unity spoken of by the Apostles I believe was not simply a togetherness, or mere agreement.
[1Co 14:1 NKJV] 1 Pursue love, and desire spiritual [gifts], but especially that you may prophesy.
[1Co 14:24-25 NKJV] 24 But if all prophesy, and an unbeliever or an uninformed person comes in, he is convinced by all, he is convicted by all. 25 And thus the secrets of his heart are revealed; and so, falling down on [his] face, he will worship God and report that God is truly among you.
[2Pe 1:21 NKJV] 21 ... for prophecy never came by the will of man, but holy men of God spoke [as they were] moved by the Holy Spirit.
[Eph 4:11-13 NKJV] 11 And He Himself gave some [to be] apostles, some prophets, some evangelists, and some pastors and teachers, 12 for the equipping of the saints for the work of ministry, for the edifying of the body of Christ, 13 till we all come to the unity of the faith and of the knowledge of the Son of God, to a perfect man, to the measure of the stature of the fullness of Christ...
[Eph 4:15-16 NKJV] 15 ... but, speaking the truth in love, [we] may grow up in all things into Him who is the head--Christ-- 16 from whom the whole body, joined and knit together by what every joint supplies, according to the effective working by which every part does its share, causes growth of the body for the edifying of itself in love.
[Act 15:13-17 NKJV] 13 And after they had become silent, James answered, saying, "Men [and] brethren, listen to me: 14 "Simon has declared how God at the first visited the Gentiles to take out of them a people for His name. 15 "And with this the words of the prophets agree, just as it is written: 16 'After this I will return And will rebuild the tabernacle of David, which has fallen down; I will rebuild its ruins, And I will set it up; 17 So that the rest of mankind may seek the LORD, Even all the Gentiles who are called by My name, Says the LORD who does all these things.'
[Zec 12:8 NKJV] 8 "In that day the LORD will defend the inhabitants of Jerusalem; the one who is feeble among them in that day shall be like David, and the house of David [shall be] like God, like the Angel of the LORD before them.
Bear in mind, to be "as God" was said concerning one other, a well-known prophet:
[Exo 7:1 NKJV] 1 So the LORD said to Moses: "See, I have made you [as] God to Pharaoh, and Aaron your brother shall be your prophet."
According to Athanasius:
"The Son of God became man so that we might become God"
In my opinion, what we experience now, in churches and elsewhere is merely a foretaste of the unity described here, when heaven, the city of God and the new Jerusalem, descends to earth.