Well, big tech companies has almost unlimited resources (both financial and labour) and their "escape velocity" from the rest of the players is too big in my opinion. I think there will be variety of metaverses owned by the big techs (and we can call metaverse almost everything what is emerging now ...), some open-sourced and some decetralized and users-owned. Depending from your needs and your views, you will choose to best ones for you. Or you won't choose any - that's also something to consider - if ordinary people really would like to "be connected"? Cheers mate!