personally, i believe for a widebody bizjet to succeed in the market, you need to prove your worth more to owners/operators of the current big dogs, your gulfstreams and falcon lineup. both have a strong foothold in the door and don't seem to be going anywhere soon. it's an awfully tough market to break through when you already have such large companies that have dominated the field for so long. to put it modestly, i would be extremely surprised if embraer succeeded in the business sector of aviation. unless they have a plan to enter the market with a whole new approach to the industry, they will struggle to stay afloat. the e135 seemed like a decent idea at first, but i've heard from several pilots the hassles with the "comfort factor" compared to something like a gulfstream.
i wouldn't count on it quite yet. i understand what you're saying, but like i said above, you have to match the demand. the crj has proven itself to be a strong competitor in the regional market, but that means nothing in an entirely different world of bizjets. you now must consider operating costs to companies that specifically work ONLY with large private jets. history in a specific area proves to be a strong argument no matter what business you're involved in.
working for an FBO, i've seen quite the array of aircraft, from the grumman lynx, to the overkill of a private jet people call a boeing business jet. of all the private aircraft i've seen, i have yet to see the CRJ biz conversion and the only reason i see E135 legacies are because of our previous affiliation with flight options, who use them as their flagship carrier.