It is sure futs help thanks to leverage.
On the other hand, you can use margin with the cubes and soon with increased margin room, it will become more rewarding.
Why not futs ? Well, I prefer futs, but I must consider all traders. Trading the futs often means open another account and split your capital. It is that way at IB, my current broker and I have several accounts because of that. The advantage with the QQQ is then obvious : there are stocks, so you can trade them just like any other stocks in your regular account. With increased margin it will become interesting.
I think it is already interesting, since you can get several moves in all directions during one day. When I do this, I even use the nasdaq futures as an indicator. QQQ tends to move after them [there is usually an initial following on ISLAND, matching the futures, but soon after you get a reaction. That's when I go in following what the futures told first].
This lag is often key to a great entry for me. A lag is like seeing the future [while watching the futures!

] you can profit from it.
But only for a portfolio not too big, otherwise you need to buy too many shares at the current of Nasdaq 100. With a larger portfolio the futs is the way imo.
vpiNeo