It depends a bit on the price, but without full Comercial presence in brick and mortar stores this thing has short legs, just like Steam Deck, a huge success but that has sold like 1/3 of the PS Vita sales.
Most power hungry PC players won't like it, it's a bit weak specs wise. You can't update it, either, it's an APU in a solded die. Maybe some will buy it as a secondary machine.
If it's 299/350 it has a shot at 5+ million.
If it's 500,600 or above, it's nearly DOA, more expensive that PS5 with many disadvantages, and with the PS6 looming in end 2027, no way.