If we continue to play this 4-2-3-1 or a 4-2-2-2 with two playmakers, and two forwards formation, he'd be a very viable option for one of the two playmaker slots. Especially given we have only Firmino and Shaqiri capable of playing there at the moment. Keita has been tried there, but long-term I feel he belongs deeper in one of the two CM slots, once Klopp starts trusting him defensively. We'll probably see that only next season.
For next year, I think this would be what the rotation will look like:
CMs: Fabinho, Wijnaldum, Henderson, Keita
AMs: Firmino, Shaqiri, Wilson
I expect Milner and Lallana to move on in the summer. Wilson coming in would be a nice boost for the AM slots. Of course, there's still Chamberlain to integrate - I wonder how he'll fit in - he's probably more suited to a 4-3-3 rather than the present formation. Perhaps Klopp encourages him to move forward (especially given that we don't have any WFs other than Salah and Mane)?
Ideally, I'd love to add someone like Houssem Aouar (or say Pablo Fornals or Nicolo Barella) to that mix - he's capable of playing both CM and AM.