Ultimately, it will depend on what the voters think. It's a good thing to encourage folks to save for retirement, so excluding retirement accounts makes sense from that perspective. On the other hand, the public as a whole get restless when they are barely getting by, can barely afford shoes for the kids, and are paying taxes so that people with $500K in the bank can get public assistance.
My guess is that all assets (including retirement assets and property/real estate) will probably be assessed as income-equivalent under some type of "expected annual distribution" calculation. From the taxpayer's perspective, I think that's fair, though it might end up hurting me personally.
Our policy should be that public assistance is for those who can't help themselves. On the other hand, I think everyone who qualifies under the present rules should take every penny available.
Maybe more likely only certain assets would be exempt from counting when determining eligibility, like 401ks, pensions and homes. Which would kill me as I have no home, no pension and a dinky 401k.