You're not so much outlining "Why Bitcoin Will Fail" so much as you're outlining how another similar (potential) currency could (potentially) outcompete Bitcoin. As you should realize from every other post in this thread, being a naysayer is not productive and not well received. Please don't take my use of the qualifier 'potential' personally, as your currency does not exist and therefore has only a potential existence.
What you're suggesting seems to come in two parts: 1) Capital assets backing a virtual currency 2) and a high(er) level of deflation.
1) Capital assets backing virtual currencies:
http://bitshares.org/Why purchase existing capital assets when new capital assets can be created via blockchain-specific IPO?
2) Deflation is an interesting subject. I think you would be hard-pressed to come up with a mechanism to initiate a decentralized capital coin buyback--centralization would likely be a negative towards such a coin's use. Generally speaking Bitcoin (and likewise various altcoins) are immune from the traditional drawbacks associated with deflation, so I can't help but view deflation rates as arbitrary assuming a constant rate > 0% is possible in BTC. The only decentralized method I can think of is destroying a portion of transaction fees until a fixed percentage of deflation is reached, but that would leave miners and therefore transacting itself vulnerable under the assumption that a certain amount of IRL capital needs to be dedicated to mining in order to secure a certain market cap.
I.E. When anyone can join in mining, obtaining 51% from a starting point of X processing power must not be economically feasible in order for the blockchain to be secure at Y valuation.
#2 Suppose Bitcoin was backed by Coca-Cola Stock. $6 billion of stock, would generate $187 million in dividends alone annually. Imagine if some blind entity to bitcoin was buying $187 million of bitcoin and destroying them, every year as long as coca-cola exists. Suppose this was another group and a blackbox not tied to the Bitcoin foundation. As a bitcoin owner which would you rather own:
Bitcoin #1 backed by nothing zero inflation.
Bitcoin #2 with the blackbox destroying $187 million, presently about 0.4 million coins a year.
That's what a capital or business coin offers. Now transaction fees might have to be higher to offer protection as there would be no money printing. One thing I notice about AZO stock above, it has yet to have a losing year this century.
Bitcoin
2013 $757
2012 $14
2011 $4.7
2010 $.30