If we are going to see advertisements, which I think is perfectly fair for content given away for free, I much prefer to see them during "commercial breaks" rather than product placement. I'm noticing a lot more product placement (sometimes subtle, sometimes 'punch-me-in-the-face' obvious) these days, and I think it's probably due, in part, to the rise of PVRs and downloads. This is content that can't be stripped out, and even if a paid subscription model of shows comes out, will still be present.
I'm happy with this decision from ABC. I don't like ads (nobody does) and I'm sure there will be some repercussions to local advertising contracts, but it seems like a fair step forward.