Surely, there will eventually be a successor coming out and it wld potentially have 1gb ram, but considering what they did with 630 compared to 620 I won't get my hopes up.
id wait to see the successor to the 720,personally the 630 seemed like a downgrade from a 620
i have 2 720s and an 820 and i dont feel like upgrading yet to a newer phone yet,maybe a 930 if my budget allows it
im waiting for more 30 series phones too